Accession Number : ADA312458

Title :   Film Cooling Heat Transfer with High Free Stream Turbulence.

Descriptive Note : Final rept. 1 Nov 95-9 Jul 96,

Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Schauer, John J. ; Pestian, David J.

PDF Url : ADA312458

Report Date : 22 NOV 1995

Pagination or Media Count : 11

Abstract : Heat transfer coefficients are shown as functions of downstream and transverse plate coordinates as determined experimentally for different blowing ratios near one and for levels of free stream turbulence from 1 percent to 17 percent of the free stream velocity. Heat transfer between the plate and the free stream is reduced by the film cooling at higher levels of free stream turbulence. Heat transfer is increased on the plate in the region between the film cooling jets at all levels of blowing ratio for one percent free stream turbulence. This undesirable augmentation of the heat transfer is modeled analytically and related to the axial vortices generated near the film cooling jet inlets. The strength of these vortices and the subsequent heat transfer increases are related to the blowing ratio.

Descriptors :   *HEAT TRANSFER, *TURBULENCE, *FILM COOLING, PRESSURE GRADIENTS, VORTICES, THERMAL ANALYSIS, GAS TURBINE BLADES, FREE STREAM, REYNOLDS NUMBER, JET ENGINE INLETS, BOUNDARY LAYER FLOW, HEAT TRANSFER COEFFICIENTS, JET MIXING FLOW.

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE