The Mechanics of Film Cooling

Author: Knuth, Eldon Luverne

Year: 1954

Degree: Dissertation (Ph.D.)

Advisor: Rannie, W. Duncan

Committee Member: Unknown, Unknown

Option: Aeronautics; Mathematics

DOI: 10.7907/G4AT-5P75

Abstract

Thin liquid wall films flowing under the influence of high-velocity turbulent gas streams were studied for the purpose of obtaining an understanding of the mechanics of film cooling. Conditions which insure liquid-film attachment to solid surfaces without loss of unevaporated liquid to the gas stream when simple radial-hole injectors are used were found; the maximum allowable coolant-flow rate for a stable coolant film was determined (a stable coolant film is obtained when no unevaporated coolant is entrained by the gas stream as the result of interfacial disturbances); and a method for calculating the evaporation rate and the surface temperature for a stable inert coolant film was found.

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