Library Subscription: Guest

ISSN Online: 2377-424X

International Heat Transfer Conference 4
August 31 - September 5, 1970, Paris-Versailles, France

FOREIGN-GAS FILM COOLING ALONG NONCONVERGING AMD CONVERGING WALLS AT VARIOUS FREE-STREAM TURBULENCE LEVELS

Get access (open in a dialog) DOI: 10.1615/IHTC4.2530
pages 1-11

Abstract

The effectiveness of foreign-gas film cooling has been investigated over an extended range of coolant-to-gas velocity ratios. Experimental data are correlated in a form suggested by a mixing model which allows for a variable degree of mixing between the hot gas and film coolant. The results show that dissimilarity between the gaseous film coolant and the hot gas is detrimental to film cooling effectiveness in presence of free-stream turbulence at the film coolant slot and/or at relatively high rates of hot-gas acceleration downstream of the slot. Limited results with a wet gas as film coolant show improved cooling effectiveness and suggest further investigation.