SECOND-STAGE TURBINE NOZZLE AIRFOIL

Abstract

The second-stage nozzles have vanes comprising airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at the radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values. The X, Y and Z values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the nozzle.

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a turbine nozzle for a gas turbine stage and particularly relates to a second-stage turbine nozzle airfoil profile.

[0002] In recent years, advanced gas turbines have trended toward increasing firing temperatures and efforts to improve cooling of the various turbine components. In a particular gas turbine design of the assignee, a high output turbine that uses air cooling is undergoing development. It will be appreciated that the design and construction of the turbine buckets and nozzles require optimized aerodynamic efficiency, as well as aerodynamic and mechanical loading.

BRIEF SUMMARY OF THE INVENTION

[0003] In accordance with an embodiment of the present invention, there is provided a unique turbine nozzle airfoil profile for a turbine stage, preferably the second stage, which may be defined by a unique loci of points to achieve the necessary efficiency in loading requirements whereby improved turbine performance is obtained. It will be appreciated that the nominal profile given by the X, Y, Z coordinates of Table I, which follows, define this unique loci of points. The coordinates given in inches in Table I are for a cold, i.e., room-temperature profile for each cross-section of the nozzle vane. Each defined cross-section is joined smoothly with adjacent cross-sections to form the complete airfoil shape. It will also be appreciated that as the nozzle heats up in use, the profile of the nozzle vane will change as a result of stress and temperature. Thus, the cold or room-temperature profile is given by the X, Y and Z coordinates for manufacturing purposes. Because a manufactured nozzle airfoil profile may be different than the nominal airfoil profile given in the following table, a distance of ±0.100 inches from the nominal profile in a direction normal to any surface location along the nominal profile and which includes any coating, defines the profile envelope for this design. The design is robust to this variation without impairment of the mechanical and aerodynamic functions.

[0004] It will also be appreciated that the airfoil can be scaled-up or scaled-down geometrically for introduction into other similar turbine designs. Consequently, the X, Y and Z coordinates of the nominal airfoil profile given below are a function of the same constant or number. That is, the X, Y and Z coordinate values given in the Table may be multiplied or divided by the same constant or number to provide a scaled-up or scaled-down version of the nozzle airfoil profile, while retaining the airfoil section shape.

[0005] In a preferred embodiment according to the present invention, there is provided a turbine nozzle having a nozzle vane in the shape of an airfoil in an envelope within ±0.100 inches in a direction normal to any airfoil surface location wherein the airfoil has an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape.

[0006] In a further preferred embodiment according to the present invention, there is provided a turbine nozzle having a nozzle vane in the shape of an airfoil having an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the z distances being joined smoothly with one another to form the complete airfoil profile, the X, Y and Z values being scaled as a function of the same constant or number to provide a scaled-up or scaled-down nozzle airfoil.

[0007] In a further preferred embodiment according to the present invention, there is provided a turbine comprising a turbine nozzle having a plurality of vanes, each of said vanes being in the shape of an airfoil in an envelope within ±0.100 inches in a direction normal to any nozzle airfoil surface location wherein the airfoil has an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape.

[0008] In a further preferred embodiment according to the present invention, there is provided a turbine comprising a turbine nozzle having a plurality of vanes, each of said vanes being in the shape of an airfoil having an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at the radially innermost aerodynamic section of the airfoil and the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape, the X, Y and Z values being scaled as a function of the same constant or number to provide a scaled-up or scaled-down nozzle airfoil.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a schematic illustration of a turbine having a second-stage nozzle employing the airfoil or vane profile hereof;

[0010] FIG. 2 is a perspective view of a nozzle vane thereof;

[0011] FIG. 3 is an end view of the nozzle vane illustrated in FIG. 2;

[0012] FIG. 4 is a perspective view thereof similar to FIG. 1;

[0013] FIG. 5 is a perspective view of the nozzle vane of FIG. 4 illustrating various airfoil profiles along the length of the vane; and

[0014] FIG. 6 is a view similar to FIG. 3 illustrating the profile sections at various Z coordinate locations along the vane.

DETAILED DESCRIPTION OF THE INVENTION

[0015] Referring now to FIG. 1, there is illustrated a portion of a turbine, generally designated 10, having a second-stage nozzle, generally designated 12. Nozzle 12 includes a plurality of vanes 14 having an airfoil shape or profile spaced circumferentially one from the other. The illustrated turbine 10 includes three stages, a first stage 16 having a plurality of circumferentially spaced nozzle vanes 18 and buckets 20 circumferentially spaced about a rotatable turbine wheel 22; the second stage nozzle 12 comprising a plurality of circumferentially space d nozzle vanes 14 and a plurality of circumferentially spaced buckets 24 mounted on a second-stage wheel 26 and a third-stage 28 mounting nozzle vanes 30 and a plurality of circumferentially spaced buckets 32 mounted on a third-stage wheel 34. it will be appreciated that the nozzle vanes and buckets lie in the hot gas path of the turbine and which gases flow through the turbine in the direction of the arrow 36. As illustrated, the nozzle vanes 14 of the second stage 12 are disposed between inner and outer bands 38 and 40, respectively, by which the nozzles form an annulus about the rotor axis.

[0016] Referring to FIG. 2, the nozzle vanes 14 have leading and trailing edges 42 and 44, respectively, with hooks 46 and 48 for securing the nozzle vane segments to the non-rotatable casing of the turbine. As will be appreciated, the nozzle vanes have various passages therethrough for flowing a cooling medium through the vanes. In the preferred and illustrated embodiment of the second-stage nozzle for this particular turbine, there are sixty nozzle vanes forming the second stage.

[0017] Referring now to drawing FIG. 2, there is illustrated a nozzle vane 14 for the second-stage having airfoil profiles defined by a Cartesian coordinate system for X, Y and Z values. The coordinate values are set forth in inches in Table I which follows. The Cartesian coordinate system has orthogonally-related X, Y and Z axes with the X, Y and Z values commencing at a radially innermost aerodynamic section 50 of the airfoil and then made relative to that section for the Z coordinate. By defining X and Y coordinate values at selected locations in a Z direction, the profile of airfoil 14 can be ascertained. By connecting the X and Y values with smooth, continuing arcs, each profile section at each distance Z is fixed. The surface profiles at the various surface locations between the distances Z are connected smoothly to one another to form the airfoil. The tabular values given in Table I below are in inches and represent airfoil profiles at ambient, non-operating or non-hot conditions and are for an uncoated airfoil. The sign convention assigns a positive value to the value Z and positive and negative values for the X and Y coordinate values, as typically used in a Cartesian coordinate system.

[0018] The Table I values are generated and shown to four decimal places for determining the profiles of the airfoil. Where the values are carried out to less than four decimal places, zeros are added to the right to complete the value to four decimal places. Further, there are typical manufacturing tolerances as well as coatings which must be accounted for in the actual profile of the airfoil. Accordingly, the values for the profile given in Table I are for a nominal airfoil. It will therefore be appreciated that typical manufacturing tolerances, i.e., plus or minus values and coating thicknesses, are additive to the X and Y values given in Table I below. Accordingly, a distance of ±0.100 inches in a direction normal to any surface location along the airfoil profile defines an airfoil profile envelope for this particular nozzle vane design and turbine. In a preferred embodiment, the nozzle vane profiles given in Table I below are for the second stage of the turbine. Sixty nozzle vanes having such profiles are equally spaced from one another about the rotor axis and thus comprise the second stage.

[0019] The coordinate values given in Table I below in inches provide the preferred nominal profile envelope.

TABLE I
X	Y	Z
Coordinate	Coordinate	Coordinate
0.0096	−1.34	13.5512
0.5594	−1.4939	12.4258
0.9047	−1.5942	11.3272
0.0541	−1.3432	12.4922
0.1887	−1.3822	11.4214
−0.0733	−1.4217	13.5621
−0.0691	−1.3783	12.5084
−0.0565	−1.3573	11.4536
0.1447	−1.5533	13.5335
0.0095	−1.4907	12.4981
−0.0617	−1.4447	11.4543
0.9513	−1.6079	13.4274
0.2123	−1.5838	11.4183
0.201	−1.389	13.5261
−0.0565	−1.3582	13.5599
0.2943	−1.4154	12.4607
0.5449	−1.4882	11.3745
−0.0312	−1.3386	12.5034
0.0512	−1.341	11.4394
−0.0314	−1.4726	13.5566
−0.0729	−1.4197	12.5089
−0.0686	−1.3776	11.4552
0.1367	−1.5493	12.4814
0.0056	−1.4883	11.4454
0.574	−1.4995	13.477
0.0571	−1.3455	13.545
0.7283	−1.5431	12.4036
−0.0696	−1.3791	13.5617
0.1153	−1.3617	12.4842
0.2859	−1.4112	11.4086
−0.0744	−1.3972	13.5623
−0.0691	−1.3783	12.5084
−0.0321	−1.3382	11.4504
0.0718	−1.5199	13.5431
−0.0337	−1.4702	12.5038
−0.0725	−1.4178	11.4557
0.129	−1.5452	11.4292
0.3027	−1.4195	13.5127
−0.0302	−1.3391	13.5565
0.4152	−1.4515	12.4448
0.7098	−1.5368	11.3529
0.0076	−1.3325	12.4983
0.111	−1.3589	11.4316
−0.0603	−1.4496	13.5604
−0.0738	−1.396	12.509
−0.0686	−1.3776	11.4552
0.2332	−1.5941	13.5218
0.066	−1.5167	12.4907
−0.036	−1.4678	11.4509
0.7469	−1.5492	13.4543
0.1196	−1.3644	13.5368
0.9279	−1.6012	12.3774
−0.0696	−1.3791	13.5617
0.1948	−1.3856	12.4737
0.4041	−1.4465	11.393
−0.0565	−1.3578	12.5068
0.0056	−1.331	11.4454
0.0134	−1.4932	13.5507
−0.061	−1.4472	12.5074
−0.0731	−1.3947	11.4558
0.2226	−1.5889	12.4701
0.0605	−1.5135	11.4382
0.4265	−1.4564	13.4964
8.6367	−5.1815	12.4172
2.771	−2.882	13.1882
2.1294	−2.5304	12.2194
1.5553	−2.2361	11.2417
6.6906	−3.6984	12.673
4.2524	−3.9336	12.9935
8.7328	−5.467	11.3514
3.5559	−3.4153	12.0319
8.9307	−6.2124	10.2722
2.8732	−2.9772	11.0685
4.4628	−2.7098	12.9658
5.5365	−5.2716	12.8247
6.9618	−3.8661	11.5842
4.9181	−4.5906	11.8528
7.5766	−4.3299	10.4502
4.2723	−4.0002	10.8846
2.444	−2.0409	13.2312
4.7975	−2.8339	11.8687
5.9341	−6.0731	11.7193
5.5578	−3.1448	10.7156
5.4333	−5.3023	10.7319
2.7532	−2.1396	12.1374
0.4443	−1.692	12.4409
3.4482	−2.3617	10.9929
9.3299	−6.4743	12.326
1.9286	−2.4132	13.299
1.1582	−1.6682	12.3471
1.3627	−2.1335	12.3202
1.6693	−1.8193	11.2267
0.8995	−1.9092	11.3279
7.9247	−4.503	12.5108
3.3645	−3.262	13.1102
2.6819	−2.8449	12.1468
2.0588	−2.503	11.1755
5.8109	−3.2613	12.7886
4.8021	−4.4333	12.9212
8.112	−4.7325	11.433
4.1275	−3.8537	11.9568
8.5338	−5.3606	10.3244
3.4463	−3.3556	10.9931
3.6139	−2.4109	13.0774
5.9368	−5.8988	12.7721
6.1189	−3.4056	11.695
5.3828	−5.1423	11.7917
6.8079	−3.7908	10.5512
4.7777	−4.4834	10.8181
1.7532	−1.8383	13.322
0.3386	−1.6428	13.508
3.9403	−2.5232	11.9814
4.689	−2.7911	10.8298
5.7718	−5.9156	10.6874
1.1765	−2.0386	13.3978
2.0333	−1.9235	12.232
0.7479	−1.8352	12.401
2.6875	−2.1237	11.0929
0.4272	−1.6839	11.39
8.9331	−5.5753	12.3782
2.4827	−2.7137	13.2261
1.8649	−2.3893	12.2542
1.1296	−1.6604	11.2977
1.3167	−2.1149	11.2731
7.1166	−3.9434	12.617
3.964	−3.6997	13.0314
8.9669	−5.8883	11.3206
3.2599	−3.2103	12.0708
2.5948	−2.808	11.1051
4.9062	−2.879	12.9075
5.3063	−4.9794	12.855
7.3648	−4.128	11.5312
4.6652	−4.3336	11.8861
4.0048	−3.7753	10.9197
2.8195	−2.1555	13.1819
5.2433	−3.0118	11.8101
5.7747	−5.7486	11.7402
5.9836	−3.3421	10.6596
5.2314	−5.0161	10.7585
1.1872	−1.6757	13.3964
0.6073	−1.7681	13.4727
3.135	−2.2584	12.0872
0.3248	−1.6363	12.4566
3.8492	−2.4934	10.9402
1.6645	−2.2783	13.3337
1.4193	−1.7441	12.3128
1.1368	−2.0223	12.3499
1.984	−1.9124	11.1854
0.7214	−1.8233	11.3513
8.2966	−4.8253	12.4619
3.0652	−3.0645	13.1496
2.4019	−2.682	12.1836
1.8027	−2.3653	11.2092
6.2547	−3.4718	12.7303
4.5321	−4.178	12.9567
8.4432	−5.0819	11.3894
3.8454	−3.6296	11.9938
8.7648	−5.7711	10.294
3.1574	−3.1593	11.0311
4.0318	−2.5542	13.0225
5.748	−5.5778	12.7969
6.5455	−3.6264	11.6389
0.775	−1.8471	13.4506
5.1581	−4.8599	11.8213
7.2012	−4.0474	10.4995
4.5305	−4.236	10.8506
2.0831	−1.9342	13.2787
4.3627	−2.672	11.9258
5.1258	−2.9619	10.7724
5.6145	−5.6022	10.7081
7.929	−4.6412	10.4039
0.9647	−1.9372	13.4257
2.3859	−2.0281	12.1857
0.5854	−1.7582	12.4224
3.0609	−2.2388	11.0438
0.3113	−1.6298	11.4053
9.1701	−6.0076	12.347
2.2017	−2.5577	13.2631
1.6092	−2.2572	12.2878
1.3844	−1.7355	11.2642
1.0981	−2.0062	11.3018
7.5296	−4.2103	12.5627
3.6678	−3.476	13.0704
9.13	−6.3422	11.2991
2.9681	−3.0207	12.1092
2.323	−2.6503	11.1408
5.3609	−3.0643	12.8478
5.0608	−4.7002	12.8872
7.75	−4.4157	11.4806
4.4011	−4.0881	11.9208
8.2512	−4.984	10.3615
3.729	−3.5607	10.956
3.2097	−2.2783	13.1306
6.0981	−6.2346	12.7509
5.6843	−3.2017	11.7521
5.5896	−5.4384	11.7646
6.4009	−3.5567	10.6047
5.0121	−4.7433	10.7873
1.4545	−1.7525	13.3613
0.4618	−1.7001	13.4918
3.5308	−2.3859	12.0352
4.263	−2.636	10.8858
5.9015	−6.2415	10.6704
1.4098	−2.1521	13.3672
1.711	−1.829	12.2744
0.9317	−1.9232	12.3769
2.3285	−2.0151	11.1401
0.564	−1.7483	11.372
9.1287	−7.681	11.2993
8.6888	−8.2716	10.304
6.0142	−9.0131	10.6556
6.3137	−6.9342	12.7225
8.9625	−8.6141	12.3743
6.2514	−8.5387	12.7307
6.2292	−7.72	11.6805
6.062	−6.888	10.6493
8.6253	−8.7717	11.3655
6.0632	−9.0612	11.7023
8.0604	−9.1302	10.3866
6.0484	−8.3472	10.6511
9.208	−6.8021	11.2889
8.9664	−7.5209	10.2675
6.0667	−9.3358	10.6487
6.3713	−7.6147	12.715
6.1555	−6.7481	11.6902
9.2903	−7.8427	12.3312
6.1639	−8.3077	11.6891
6.1064	−7.5064	10.6434
8.9978	−8.0785	11.3165
8.4965	−8.5959	10.3293
6.0124	−8.8141	10.6558
9.0176	−6.66	10.2608
6.1437	−9.0753	12.7449
6.1209	−8.582	11.6947
6.2262	−6.5846	12.734
8.7531	−8.9487	12.4019
6.3076	−8.2455	12.7233
6.2344	−7.4063	11.6798
5.9979	−6.5667	10.6577
9.3985	−6.9465	12.317
8.4037	−9.0674	11.3946
6.0848	−8.8329	11.6995
7.8417	−9.3323	10.4153
6.0752	−8.0792	10.6475
9.2039	−7.2528	11.2894
8.8493	−7.9128	10.2829
6.0326	−9.1877	10.6532
6.361	−7.2791	12.7163
6.0633	−6.4108	11.7023
9.1455	−8.2456	12.3503
6.1924	−8.8186	12.7385
6.203	−8.0207	11.6839
6.0967	−7.2022	10.6447
8.8261	−8.4422	11.3391
6.0612	−9.2663	11.7026
8.2812	−8.8857	10.3576
6.0253	−8.592	10.6541
9.0268	−7.1003	10.2596
8.5253	−9.2503	12.4318
6.3507	−7.9375	12.7177
6.2116	−7.0812	11.6828
9.3806	−7.4072	12.3194
6.1137	−9.3097	12.7488
8.1785	−9.3182	11.4242
6.097	−7.799	10.6447
6.2988	−10.0799	12.7245
6.1196	−9.598	11.6949
6.6862	−10.3088	12.6736
6.5595	−10.2754	12.6902
6.3995	−9.9791	11.6581
6.219	−9.6267	10.6286
7.031	−10.2982	12.6282
6.5626	−10.0529	11.6366
6.5395	−10.0462	11.6397
6.4116	−9.7785	10.6033
6.2921	−9.8887	11.6722
7.8536	−9.8986	12.5201
6.8272	−10.0781	11.6019
6.5845	−9.8315	10.5806
7.5425	−9.8288	11.5078
7.0919	−9.7764	10.5139
6.1645	−9.5524	10.6358
6.1291	−9.7062	12.7468
6.4281	−10.2023	12.7075
6.2312	−9.8158	11.6802
6.7757	−10.3181	12.6618
6.6121	−10.2932	12.6833
6.4725	−10.0203	11.6485
6.3175	−9.7208	10.6157
7.3015	−10.2165	12.5927
6.6328	−10.0682	11.6274
6.471	−9.8027	10.5955
6.449	−9.7946	10.5984
8.2955	−9.5074	12.462
7.054	−10.0413	11.572
6.7275	−9.8427	10.5618
7.9564	−9.5269	11.4534
7.4328	−9.621	10.4691
6.2322	−9.9844	12.7332
6.0806	−9.4462	11.7
6.654	−10.303	12.6778
6.5256	−10.2605	12.6947
6.3493	−9.9419	11.6647
6.9258	−10.3138	12.6421
6.5395	−10.0462	11.6397
6.5224	−10.0406	11.6419
6.3858	−9.7652	10.6067
7.6508	−10.0375	12.5468
6.7441	−10.0793	11.6128
6.5385	−9.8222	10.5866
7.3593	−9.9275	11.5319
6.9505	−9.8159	10.5325
6.1082	−9.5209	12.7495
6.3659	−10.1511	12.7157
6.1716	−9.7197	11.688
6.7268	−10.3142	12.6682
6.5885	−10.286	12.6864
6.4405	−10.0039	11.6527
6.2712	−9.6818	10.6218
7.1563	−10.2672	12.6118
6.5936	−10.0605	11.6326
6.449	−9.7946	10.5984
6.4328	−9.7381	10.6005
8.0699	−9.7227	12.4917
6.9305	−10.0671	11.5883
6.6464	−9.8395	10.5725
7.7428	−9.6962	11.4815
6.1731	−9.8614	12.741
6.6301	−10.2978	12.6809
6.4819	−10.2374	12.7004
6.112	−9.4561	10.6427
6.841	−10.3192	12.6532
6.6301	−10.2978	12.6809
6.5	−10.0323	11.6449
6.3557	−9.7474	10.6107
7.4655	−10.1424	12.5711
6.6804	−10.0747	11.6212
6.5007	−9.8122	10.5916
7.2518	−9.7135	10.4929
7.1973	−9.9961	11.5532
6.8288	−9.8364	10.5485
7.6309	−9.495	10.4431
0.1152	−1.5363	9.3237
0.0044	−1.4805	8.2863
0.3931	−1.4408	10.3413
0.6731	−1.5207	9.2504
1.0427	−1.6311	8.1486
0.0035	−1.3296	10.3925
0.1021	−1.3531	9.3254
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2.3973	−2.7286	4.8111
5.9226	−3.5731	5.4008
0.067	−1.3725	6.1882
0.0572	−1.3534	5.1337
3.5862	−3.5736	4.6548
4.0659	−2.696	5.6449
0.0112	−1.475	6.1808
4.6519	−2.979	4.5147
0.0652	−1.4285	5.1348
1.3296	−2.1227	6.0046
2.332	−2.0557	5.8728
0.3537	−1.6442	6.1329
2.8866	−2.2602	4.7467
0.1588	−1.5535	5.1053
0.1557	−1.3664	6.1589
0.9775	−1.6172	6.0509
1.1232	−2.0178	6.0317
1.3962	−1.7512	4.9427
0.7356	−1.8307	5.0295
0.2407	−1.3921	6.1477
2.2311	−2.6142	5.8861
1.0861	−2.0052	4.9834
0.4487	−1.4555	5.0672
1.7102	−2.3326	4.9014
0.0371	−1.3359	6.1842
3.463	−3.4341	5.7241
0.0316	−1.3279	5.122
2.8828	−3.042	4.7472
0.23	−1.3885	5.096
5.1943	−3.1918	5.4965
0.0714	−1.4073	6.1887
5.7161	−3.5157	4.3748
0.0668	−1.371	5.135
0.2419	−1.5927	5.0944
0.0956	−1.5241	6.1668
3.9229	−2.6632	4.6105
0.0147	−1.4723	5.1281
1.7214	−1.853	5.9531
0.6082	−1.7651	6.0994
2.2505	−2.0341	4.8303
0.3392	−1.6389	5.0816
0.6112	−1.5045	6.099
1.5439	−2.2342	5.9764
0.9419	−1.6077	5.0024
0.0876	−1.3459	6.1678
2.7211	−2.9131	5.8216
2.162	−2.5877	4.842
6.2749	−3.7853	5.3545
0.067	−1.3725	6.1882
0.0382	−1.3353	5.1312
3.358	−3.3881	4.6848
4.4454	−2.8534	5.595
0.0458	−1.4548	6.1854
5.0115	−3.148	4.4674
0.0715	−1.4048	5.1356
1.9328	−2.456	4.8721
3.807	−3.768	4.6257
2.6556	−2.1672	5.8303
0.2534	−1.5973	6.146
3.2214	−2.3854	4.7027
0.0889	−1.5206	5.1145
1.1997	−1.6866	6.0217
0.934	−1.9236	6.. 0566
1.6606	−1.8366	4.9079
0.5861	−1.7576	5.0491
1.995	−2.4793	5.9171
0.3441	−1.4234	6.1341
0.5879	−1.4981	5.0489
1.4946	−2.2167	4.9297
3.3382	−2.4137	5.7405
0.0051	−1.3245	6.18
3.221	−3.2528	5.7559
0.0822	−1.3433	5.1154
2.6379	−2.8796	4.7794
5.1716	−5.5218	5.4995
4.752	−4.892	4.5015
5.3151	−6.187	4.4275
7.9531	−5.5511	5.1339
7.9262	−6.1153	4.0842
4.3506	−4.2546	5.6074
6.6156	−4.0158	5.3097
7.0099	−4.4359	4.2047
4.7264	−4.7297	5.558
4.2207	−4.1866	4.5714
5.3705	−6.0631	5.4734
5.0323	−5.4109	4.4647
7.5234	−4.8493	5.1904
7.724	−5.387	4.1108
4.1434	−4.0339	5.6347
6.3901	−3.9372	4.2862
5.0406	−5.2481	5.5167
4.5886	−4.6466	4.523
5.238	−5.9326	4.4376
8.0783	−5.9301	5.1174
6.9412	−4.2677	5.2669
7.2858	−4.7231	4.1684
4.5454	−4.4866	5.5818
4.019	−3.9722	4.5979
5.281	−5.7942	5.4851
4.9001	−5.1471	4.482
7.7629	−5.1849	5.1589
7.8582	−5.7487	4.0932
3.9254	−3.8239	5.6633
6.709	−4.1752	4.2443
4.8918	−4.9837	5.5363
4.4111	−4.4114	4.5463
5.4425	−6.3269	5.4639
5.1444	−5.6733	4.4499
8.1358	−6.3114	5.1099
7.2463	−4.5443	5.2268
7.5276	−5.0398	4.1366
6.0729	−8.6192	5.381
5.9576	−8.3731	4.343
5.9455	−8.3648	4.3446
6.3487	−8.7009	5.3448
6.112	−8.4479	4.3227
5.5438	−6.8334	5.4506
6.6287	−8.4046	4.2548
7.9519	−7.3617	5.134
5.6818	−7.8781	5.4324
5.5365	−7.3375	4.3984
5.8604	−8.4152	5.409
6.004	−8.5726	5.3901
5.8879	−8.319	4.3522
6.1404	−8.6528	5.3722
5.5789	−7.0741	5.446
5.997	−8.3976	4.3379
6.5837	−8.6807	5.3139
6.2641	−8.4748	4.3027
7.4421	−8.1404	5.2011
5.6078	−7.3053	5.4422
6.9506	−8.222	4.2125
5.4287	−6.6763	4.4126
7.0672	−8.461	5.2503
8.1282	−6.6835	5.1109
5.7442	−8.1545	5.4242
7.7762	−7.1347	4.104
5.596	−7.6871	4.3906
5.9332	−8.5081	5.3994
5.7864	−8.2035	4.3655
6.0495	−8.6049	5.3841
6.0324	−8.5934	5.3864
5.9296	−8.3533	4.3467
6.2605	−8.6896	5.3564
6.0624	−8.4297	4.3293
6.8907	−8.5661	5.2735
5.4993	−6.5841	5.4564
6.4907	−8.4502	4.273
7.804	−7.657	5.1535
5.6563	−7.7077	5.4358
7.3029	−7.9004	4.1662
5.5058	−7.1329	4.4024
7.4772	−7.6825	4.1433
5.8202	−8.3462	5.4143
7.9297	−6.4749	4.0838
5.6655	−7.9538	4.3814
5.9844	−8.5567	5.3927
5.8595	−8.292	4.3559
6.103	−8.6355	5.3771
5.9743	−8.384	4.3408
5.9576	−8.3731	4.343
6.4567	−8.6999	5.3306
6.1787	−8.4648	4.314
7.2528	−8.3198	5.2259
6.7835	−8.3296	4.2345
5.3778	−6.4353	4.4192
8.0634	−7.0358	5.1194
5.7109	−8.0272	5.4286
7.6402	−7.4237	4.1218
5.5658	−7.5224	4.3945
5.8988	−8.4684	5.4039
5.7454	−8.1376	4.3709
6.0324	−8.5934	5.3864
6.0201	−8.5847	5.388
5.9103	−8.3382	4.3492
6.1916	−8.6718	5.3654
6.0262	−8.4132	4.334
6.7279	−8.6381	5.2949
6.3684	−8.472	4.289
7.6286	−7.9202	5.1765
5.6325	−7.5167	5.4389
5.4704	−6.909	4.4071
5.7044	−8.0548	4.3763
5.7808	−8.2597	5.4194
7.8762	−6.8172	4.0908
5.6291	−7.8311	4.3862
5.9618	−8.5366	5.3956
5.8252	−8.2543	4.3604
7.1253	−8.0796	4.1895
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3.2585	−3.3486	3.6437
5.5129	−3.4386	3.3473
0.5643	−1.4911	3.9979
4.8303	−3.0891	3.4371
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3.1028	−2.354	3.6642
0.0833	−1.5165	4.0611
1.4509	−2.1968	3.8813
1.5984	−1.8203	3.8619
0.5675	−1.7474	3.9974
0.0766	−1.3406	4.062
2.5598	−2.8497	3.7355
5.8451	−3.6302	3.3037
0.0666	−1.3695	4.0808
3.6953	−3.7191	3.5863
1.2487	−2.0898	3.9079
4.1322	−2.7724	3.5288
0.0496	−1.4491	4.0785
0.2323	−1.5868	4.0415
1.1125	−1.6632	3.9258
0.8752	−1.8991	3.957
0.3155	−1.4143	4.0306
0.01	−1.3227	4.0733
3.0305	−3.1754	3.6737
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2.4681	−2.1187	3.7476
3.4359	−2.4841	3.6204
0.0273	−1.4903	4.0684
1.8771	−1.9131	3.8253
0.4338	−1.6851	4.0144
0.2192	−1.3846	4.0432
0.7228	−1.5403	3.977
0.14	−1.3602	4.0535
2.3265	−2.7011	3.7662
6.1685	−3.8365	3.2611
0.0574	−1.3525	4.0796
3.4803	−3.5296	3.6145
4.4828	−2.9273	3.4827
0.0657	−1.4256	4.0807
2.7801	−2.2324	3.7066
0.1514	−1.5485	4.0521
1.3435	−1.7372	3.8954
0.713	−1.8186	3.9783
0.43	−1.4497	4.0155
1.6601	−2.3108	3.8538
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2.7973	−3.0094	3.7043
0.0666	−1.3695	4.0808
5.174	−3.259	3.3919
3.7792	−2.6232	3.5752
0.0175	−1.4693	4.0743
2.167	−2.0125	3.7872
0.327	−1.6317	4.029
1.8761	−2.4324	3.8254
0.9055	−1.5976	3.953
1.0538	−1.9893	3.9335
2.0984	−2.5623	3.7962
6.4801	−4.0607	3.2202
4.2862	−4.3431	3.5086
5.0171	−5.5621	3.4125
7.2862	−4.879	3.1142
4.6231	−4.8075	3.4643
5.1921	−6.0593	3.3895
6.7751	−4.3066	3.1814
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7.4823	−5.2099	3.0884
7.693	−5.9081	3.0607
4.4612	−4.5705	3.4856
7.7063	−6.255	3.059
5.1127	−5.8129	3.3999
7.0467	−4.5782	3.1457
3.902	−3.9175	3.5591
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5.2575	−6.2999	3.3809
7.6191	−5.5561	3.0705
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2.9452	−3.1357	2.6317
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5.631	−3.5321	2.2786
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3.593	−3.6653	2.5465
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4.4596	−2.9596	1.3795
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2.0817	−1.9908	2.7452
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1.9885	−2.5013	1.7043
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2.8576	−2.2909	1.5901
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1.4695	−1.7893	1.7725
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1.8233	−2.4075	2.7792
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2.3713	−2.0937	2.7071
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5.4102	−3.4359	1.2545
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6.0097	−3.8148	1.1757
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0.8252	−1.873	1.8572
3.3834	−3.481	2.5741
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3.1656	−2.4111	1.5496
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1.7263	−1.8775	1.7388
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4.6479	−3.0229	2.4079
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4.6479	−3.0229	2.4079
2.7184	−2.9734	2.6615
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5.3086	−3.3521	2.321
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7.4358	−6.3566	2.0414
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7.1603	−5.5049	1.0244
6.2882	−4.0349	1.1391
4.344	−4.4905	2.4478
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6.8009	−4.4274	2.1249
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5.1421	−6.165	2.3429
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7.2248	−5.0324	2.0691
7.3595	−5.3645	2.0514
7.1953	−5.824	1.0198
6.2489	−3.9366	2.1974
6.5434	−4.2817	1.1055
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4.898	−5.4496	2.375
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7.4358	−6.3566	2.0414
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5.8376	−8.1301	3.3046
6.4655	−7.628	1.1158
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5.8268	−7.959	2.2529
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6.284	−8.245	3.246
5.9587	−8.0091	2.2356
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6.9985	−7.838	3.152
5.3562	−6.7594	3.3679
6.5734	−7.8596	2.1548
6.4352	−7.9398	2.1729
6.1093	−7.7894	1.1626
7.6662	−6.5868	3.0643
5.5373	−7.652	3.3441
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5.321	−7.0153	2.3194
6.7359	−7.3639	1.0802
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5.7509	−8.0524	3.316
5.5358	−7.6784	2.2912
5.342	−7.3004	1.2635
5.8848	−8.1624	3.2984
5.8728	−8.1547	3.3
5.7401	−7.9052	2.2643
5.877	−7.9823	2.2463
6.0361	−8.2297	3.2786
5.8488	−7.9699	2.25
5.7228	−7.7294	1.2134
6.5328	−8.1713	3.2133
6.1978	−8.0175	2.2041
6.1012	−8.0256	2.2168
5.8795	−7.7861	1.1928
5.9115	−7.9953	2.2418
7.3191	−7.4388	3.1099
5.43	−7.175	3.3582
6.8685	−7.5993	2.116
6.7196	−7.7467	2.1355
5.1971	−6.392	2.3357
6.3355	−7.7096	1.1329
7.3722	−6.6594	2.0497
5.6315	−7.8078	2.2786
5.6223	−7.8654	3.333
5.3972	−7.3429	2.3094
6.9815	−6.9589	1.0479
5.2129	−6.8549	1.2804
7.3722	−6.6594	2.0497
7.1532	−7.1967	2.0785
5.815	−8.1124	3.3076
5.4478	−7.4909	1.2496
5.8001	−7.7632	1.2032
5.9236	−8.1847	3.2933
5.8106	−7.9502	2.255
5.7825	−7.9337	2.2587
5.6638	−7.6958	1.2212
6.1835	−8.251	3.2592
5.9587	−8.0091	2.2356
6.3099	−7.9905	2.1894
5.7726	−7.7525	1.2069
6.8361	−7.9829	3.1734
5.3113	−6.5336	3.3738
6.4352	−7.9398	2.1729
6.3099	−7.9905	2.1894
7.5823	−6.897	3.0753
5.4991	−7.5133	3.3491
7.1532	−7.1967	2.0785
6.6008	−7.5132	1.098
7.0151	−7.4163	2.0967
5.7105	−8.0052	3.3213
5.4873	−7.588	2.2975
7.1505	−6.4277	1.0257
5.2942	−7.1725	1.2697
5.1752	−6.6672	1.2854
5.9523	−8.1988	3.2896
5.8569	−8.1441	3.3021
5.7106	−7.3826	2.2682
5.5511	−7.609	1.236
5.9877	−8.2137	3.2849
5.8488	−7.9699	2.25
5.8268	−7.959	2.2529
5.8106	−7.9502	2.255
5.7068	−7.7209	1.2155
6.4012	−8.22	3.2306
6.1012	−8.0256	2.2168
6.0214	−8.0209	2.2273
5.8338	−7.7743	1.1988
6.0167	−7.7988	1.1748
7.1614	−7.6571	3.1306
5.3952	−6.9766	3.3628
6.7196	−7.7467	2.1355
6.5734	−7.8596	2.1548
6.2165	−7.7614	1.1485
5.5789	−7.7694	3.3387
7.2761	−6.9403	2.0624
5.3579	−7.189	2.3145
6.8647	−7.1791	1.0633
5.7862	−8.0874	3.3114
5.5847	−7.7511	2.2847
5.3943	−7.4065	1.2566
5.9013	−8.1723	3.2963
5.8848	−8.1624	3.2984
5.763	−7.9211	2.2613
5.6336	−7.6757	1.2251
6.1009	−8.2439	3.27
5.9115	−7.9953	2.2418
5.877	−7.9823	2.2463
5.751	−7.7431	1.2097
5.735	−7.7355	1.2118
6.6793	−8.0933	3.194
6.1978	−8.0175	2.2041
5.94	−7.7958	1.1848
7.464	−7.1816	3.0908
5.4638	−7.3541	3.3538
7.0151	−7.4163	2.0967
6.8686	−7.5993	2.116
5.2434	−6.6115	2.3296
5.735	−7.7355	1.2118
5.6669	−7.9435	3.3271
5.284	−6.8226	2.3243
5.4404	−7.4761	2.3037
7.0798	−6.704	1.035
5.2516	−7.0236	1.2753
0.0174	−1.3204	0.9103
0.0658	−1.3636	0.9212
0.1872	−1.3719	0.8879
0.0416	−1.3326	0.918
0.0609	−1.3325	0.9045
0.0658	−1.3636	0.9212
0.0696	−1.3766	0.9217
0.0162	−1.3205	0.9147
0.117	−1.3499	0.8972
0.0574	−1.3486	0.9201
0.3738	−1.431	0.8634
1.5298	−2.2409	0.7114
2.5964	−2.866	0.5712
3.6224	−3.7039	0.4364
5.4888	−3.5113	0.191
3.3358	−2.5003	0.474
0.0235	−1.4582	0.9156
1.9072	−1.9536	0.6618
0.2943	−1.6116	0.8739
0.9656	−1.9475	0.7856
1.9405	−2.4654	0.6574
5.7743	−3.6968	0.1535
3.0267	−3.1761	0.5147
0.0664	−1.4157	0.9213
4.2748	−2.8986	0.3506
0.0709	−1.3941	0.9219
0.0696	−1.5027	0.9034
0.4924	−1.4693	0.8478
1.3345	−2.1379	0.7371
2.3738	−2.7221	0.6005
3.4315	−3.5193	0.4614
3.6502	−2.6297	0.4327
0.0525	−1.4383	0.9194
2.7352	−2.2626	0.553
2.1733	−2.0507	0.6268
0.207	−1.569	0.8853
0.9765	−1.6292	0.7842
0.8002	−1.8636	0.8073
2.8144	−3.0171	0.5426
0.2724	−1.3988	0.8767
1.732	−2.3497	0.6849
1.4052	−1.7758	0.7278
4.5843	−3.0396	0.3099
0.516	−1.7211	0.8447
3.0307	−2.3781	0.5141
5.1931	−3.3429	0.2299
4.8909	−3.1868	0.2696
1.6511	−1.8621	0.6955
0.0179	−1.4779	0.9102
0.6324	−1.5149	0.8294
1.1463	−2.0403	0.7619
2.1547	−2.5891	0.6293
3.2327	−3.3434	0.4876
0.3973	−1.6623	0.8603
3.9633	−2.7622	0.3915
2.4493	−2.1536	0.5906
0.1324	−1.5329	0.8951
0.7938	−1.5681	0.8082
1.1803	−1.6983	0.7574
0.6503	−1.7881	0.827
6.2895	−4.1408	0.0858
4.4354	−4.7515	0.3295
4.9234	−5.891	0.2653
6.8003	−5.0072	0.0186
3.9779	−4.0986	0.3896
4.8558	−5.6701	0.2742
4.6774	−5.2156	0.2977
5.0257	−6.3142	0.2519
6.9416	−5.917	0
6.5028	−4.4068	0.0577
4.294	−4.5261	0.3481
6.9279	−5.6206	0.0018
6.8822	−5.3159	0.0078
4.1413	−4.3084	0.3681
6.0437	−3.9049	0.1181
3.8048	−3.897	0.4124
4.5647	−4.9842	0.3125
4.9791	−6.1061	0.258
6.9256	−6.2018	0.0021
6.6756	−4.7012	0.035
4.7742	−5.4446	0.2849
5.3029	−7.2267	0.2154
5.6751	−7.5271	0.1665
5.6593	−7.5207	0.1686
5.8585	−7.5708	0.1424
6.3575	−7.3966	0.0768
5.6311	−7.5082	0.1723
6.8808	−6.4719	0.008
5.1462	−6.8609	0.236
5.4188	−7.3648	0.2002
5.6112	−7.4985	0.1749
6.1231	−7.5325	0.1076
5.7232	−7.5441	0.1602
6.0208	−7.5615	0.1211
5.1924	−7.0047	0.23
6.6025	−7.1293	0.0446
5.2451	−7.1269	0.223
5.5182	−7.4443	0.1871
5.6593	−7.5207	0.1686
5.6472	−7.5155	0.1702
5.8001	−7.563	0.1501
5.932	−7.5721	0.1327
6.2358	−7.4797	0.0928
6.8079	−6.7238	0.0176
5.1055	−6.6971	0.2414
5.6963	−7.5351	0.1637
5.3615	−7.3045	0.2077
5.557	−7.4689	0.182
5.5877	−7.4863	0.178
6.4818	−7.2802	0.0605
5.4717	−7.4104	0.1932
5.7559	−7.5533	0.1559
6.7131	−6.9435	0.0301
5.0668	−6.5145	0.2465
0.0096	−1.334	13.5512
0.5594	−1.4939	12.4258
0.9047	−1.5942	11.3272
0.0541	−1.3432	12.4922
0.1887	−1.3322	11.4214
0.0733	−1.4217	13.5621
0.0691	−1.3783	12.5084
0.0565	−1.3573	11.4536
0.1447	−1.5533	13.5335
0.0095	−1.4907	12.4981
0.0617	−1.4447	11.4543
0.9513	−1.6079	13.4274
0.2123	−1.5838	11.4183
0.201	−1.389	13.5261
0.0565	−1.3582	13.5599
0.2943	−1.4154	12.4607
0.5449	−1.4882	11.3745
0.0312	−1.3386	12.5034
0.0512	−1.341	11.4394
0.0314	−1.4726	13.5566
0.0729	−1.4197	12.5089
0.0686	−1.3776	11.4552
0.1367	−1.5493	12.4814
0.0056	−1.4883	11.4454
0.574	−1.4995	13.477
0.0571	−1.3455	13.545
0.7283	−1.5431	12.4036
0.0696	−1.3791	13.5617
0.1153	−1.3617	12.4842
0.2859	−1.4112	11.4086
0.0744	−1.3972	13.5623
0.0691	−1.3783	12.5084
0.0321	−1.3382	11.4504
0.0718	−1.5199	13.5431
0.0337	−1.4702	12.5038
0.0725	−1.4178	11.4557
0.129	−1.5452	11.4292
0.3027	−1.4195	13.5127
0.0302	−1.3391	13.5565
0.4152	−1.4515	12.4448
0.7098	−1.5368	11.3529
0.0076	−1.3325	12.4983
0.111	−1.3589	11.4316
0.0603	−1.4496	13.5604
0.0738	−1.396	12.509
0.0686	−1.3776	11.4552
0.2332	−1.5941	13.5218
0.066	−1.5167	12.4907
0.036	−1.4678	11.4509
0.7469	−1.5492	13.4543
0.1196	−1.3644	13.5368
0.9279	−1.6012	12.3774
0.0696	−1.3791	13.5617
0.1948	−1.3856	12.4737
0.4041	−1.4465	11.393
0.0565	−1.3578	12.5068
0.0056	−1.331	11.4454
0.0134	−1.4932	13.5507
0.061	−1.4472	12.5074
0.0731	−1.3947	11.4558
0.2226	−1.5889	12.4701
0.0605	−1.5135	11.4382
0.4265	−1.4564	13.4964
8.6367	−5.1815	12.4172
2.771	−2.882	13.1882
2.1294	−2.5304	12.2194
1.5553	−2.2361	11.2417
6.6906	−3.6984	12.673
4.2524	−3.9336	12.9935
8.7328	−5.467	11.3514
3.5559	−3.4153	12.0319
8.9307	−6.2124	10.2722
2.8732	−2.9772	11.0685
4.4628	−2.7098	12.9658
5.5365	−5.2716	12.8247
6.9618	−3.8661	11.5842
4.9181	−4.5906	11.8528
7.5766	−4.3299	10.4502
4.2723	−4.0002	10.8846
2.444	−2.0409	13.2312
4.7975	−2.8339	11.8687
5.9341	−6.0731	11.7193
5.5578	−3.1448	10.7156
5.4333	−5.3023	10.7319
2.7532	−2.1396	12.1374
0.4443	−1.692	12.4409
3.4482	−2.3617	10.9929
9.3299	−6.4743	12.326
1.9286	−2.4132	13.299
1.1582	−1.6682	12.3471

[0020] It will also be appreciated that the airfoil disclosed in the above Table may be scaled up or down geometrically for use in other similar turbine designs. Consequently, the coordinate values set forth in Table I may be scaled upwardly or downwardly such that the airfoil section shape remains unchanged. A scaled version of the coordinates in Table I would be represented by X, Y and Z coordinate values multiplied or divided by the same constant or number.

[0021] In FIGS. 3 and 4, the radially outermost profile 52 is illustrated with various other profile sections illustrated in FIG. 4 along the length of the airfoil. The various profiles are also illustrated in FIG. 6 with the profiles being superposed one over the other.

[0022] While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A turbine nozzle having a nozzle vane in the shape of an airfoil in an envelope within +0.100 inches in a direction normal to any airfoil surface location wherein the airfoil has an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape.

2. A turbine nozzle according to claim 1 forming part of a second stage of a turbine.

3. A turbine nozzle having a nozzle vane in the shape of an airfoil having an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil profile; the X, Y and Z values being scaled as a function of the same constant or number to provide a scaled-up or scaled-down nozzle airfoil.

4. A turbine nozzle according to claim 3 forming part of a second stage of a turbine.

5. A turbine comprising a turbine nozzle having a plurality of vanes, each of said vanes being in the shape of an airfoil in an envelope within ±0.100 inches in a direction normal to any nozzle airfoil surface location wherein the airfoil has an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape.

6. A turbine according to claim 5 wherein the turbine nozzle comprises a second stage of the turbine.

7. A turbine according to claim 5 wherein the turbine nozzle has sixty vanes.

8. A turbine comprising a turbine nozzle having a plurality of vanes, each of said vanes being in the shape of an airfoil having an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at the radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape; the X, Y and Z values being scaled as a function of the same constant or number to provide a scaled-up or scaled-down nozzle airfoil.

9. A turbine according to claim 8 wherein the turbine nozzle comprises a second stage of the turbine.

10. A turbine according to claim 8 wherein the turbine nozzle has sixty vanes.