Claims
- 1. A process for reducing skin friction and inhibiting effects of liquid turbulence, comprising
- providing a body having an exterior surface over which a fluid flows,
- forming a multiplicity of adjacent, evenly spaced, longitudinal grooves extending along an entire length of the surface, such that the grooves are parallel to the flow over the surface,
- providing each of the multiplicity of grooves with small surface projections such that each groove has increased frictional holding power,
- injecting a drag reducing polymer into each individual groove valley at multiple points along each groove such that amounts of the polymer needed to reduce skin friction along the entire length of the surface are minimized, and
- controlling the rate of diffusion of the polymer from each groove into the liquid by the dimensions of each groove.
- 2. A process for reducing skin friction and inhibiting effects of liquid turbulence, comprising
- providing a body having an exterior surface over which a fluid flows,
- forming a multiplicity of adjacent, evenly spaced, longitudinal grooves extending along an entire length of the surface, such that the grooves are parallel to the flow over the surface,
- injecting a drag reducing polymer into the individual groove valleys at multiple points along each groove such that amounts of the polymer needed to reduce skin friction along the entire length of the surface are minimized,
- infecting the drag reducing polymer by means of an array of slots or holes angled such that the injected polymer is directed parallel to each groove, in the direction of the liquid flow, and
- limiting the rate of diffusion of the polymer from each groove into the liquid by the dimensions of each groove.
- 3. The process of claim 2, further including the step of providing each of the multiplicity of grooves with small surface projections such that each groove has increased frictional holding power.
Parent Case Info
This is a continuation of copending application(s) Ser. No. 07/567,025 filed on Aug. 14, 1990, now abandoned.
ORIGIN OF THE INVENTION
The invention described herein was made jointly in the performance of work under a NASA contract and by an employee of the United States Government. In accordance with 35 U.S.C. 202, the contractor elected not to retain title.
US Referenced Citations (5)
Continuations (1)
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Number |
Date |
Country |
Parent |
567025 |
Aug 1990 |
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