Claims
- 1. A flame holder apparatus, for use with burner apparatus for gaseous fuels, of the type configured for holding a flame and directing the combustion products of the flame into a heat exchanger plenum, the flame holder apparatus comprising:
- a plate member, having at least one flame holder region having a plurality of apertures,
- the apertures being configured into two regions,
- the apertures of a first region being disposed for directing flow through the plate and in a radially outward direction, relative to the at least one flame holder region,
- the apertures of a second region being disposed for directing flow through the plate and in a radially inward direction, relative to the at least one flame holder region.
- 2. The flame holder apparatus according to claim 1, wherein the at least one flame holder region further has a generally circular plan configuration.
- 3. The flame holder apparatus according to claim 2, wherein the first region comprises a circular area, centrally positioned in the at least one flame holder region.
- 4. The flame holder apparatus according to claim 3, wherein the second region comprises an annular area, surrounding the first region.
- 5. The flame holder apparatus according to claim 1, wherein the first region comprises a convex conical region, centrally positioned in the at least one flame holder region.
- 6. The flame holder apparatus according to claim 5, wherein the second region comprises an annular concave conical region centered within the at least one flame holder region.
- 7. The flame holder apparatus according to claim 1, wherein the second region comprises an annular concave conical region centered within the at least one flame holder region.
- 8. The flame holder apparatus according to claim 1, wherein the apertures in the plate are configured so that the flow of gas through the plate at each location on the plate is substantially perpendicular to the plate at that respective location.
- 9. The apparatus according to claim 1, wherein the apertures have predominantly uniform diameters.
- 10. The apparatus according to claim 9, wherein a plurality of apertures, positioned around a peripheral region of the at least one flame holder region, have diameters which are greater than the diameters of the apertures in remaining portions of the at least one flame holder region.
- 11. The apparatus according to claim 1, wherein the apertures have diameters which are of substantially the same order of magnitude as the lengths of the apertures through the plate.
- 12. The apparatus according to claim 1, wherein the at least one flame holder region comprises two flame holder regions disposed on the plate member, at laterally spaced positions relative to one another.
- 13. The apparatus according to claim 12, wherein a plurality of apertures is disposed extending between the two flame holder regions for providing cross-lighting between the two flame holder regions.
- 14. The apparatus according to claim 1, wherein at least some of the apertures in the at least one flame holder region are arranged in hexagonal groups.
- 15. The apparatus according to claim 5, wherein at least some of the apertures in the first region are arranged in hexagonal groups.
Parent Case Info
This application depends from and claims priority under 35 U.S.C. .sctn.119(e) of U.S. Provisional Application No. 60/024,170, filed Aug. 19, 1996, the disclosure of which is incorporated herein by reference.
US Referenced Citations (15)
Foreign Referenced Citations (1)
Number |
Date |
Country |
57-187517 |
Nov 1992 |
JPX |