Accession Number : ADA190500

Title :   Film Cooling Effectiveness on a Flat Plate in High Free-Stream Turbulence Using a Single Row of 30 Deg Slant-Hole Injectors.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Jumper, Geoffrey W

PDF Url : ADA190500

Report Date : Dec 1987

Pagination or Media Count : 91

Abstract : In the continuing search to understand the mechanisms influencing film cooling effectiveness, this thesis examines film cooling effectiveness on a flat plate in high free-stream turbulence using a single row of 30 slant-hole injectors. The primary area of focus is the area within 42 diameters down-stream of injection. of interest are blowing rates for optimum film cooling effectiveness within 10 diameters down-stream of injection, and the decay of film cooling effectiveness down the plate. Free-stream velocities from 50-175 fps and free-stream turbulence intensities from 13.5 - 18.5% were examined. Changes in Reynolds number or free-stream turbulence had little effect on blowing rates for optimum film cooling effectiveness. In comparison with tests conducted in low free-stream turbulence, around 5%, higher free-stream turbulence causes a faster decay in film cooling effectiveness down the plate.

Descriptors :   *FILM COOLING, *FREE STREAM, *TURBULENCE, DECAY, FLAT PLATE MODELS, INTENSITY, OPTIMIZATION, RATES, REYNOLDS NUMBER, THESES, VELOCITY

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE