Accession Number : ADA182496

Title :   Experimental Survey and Heat Flux Prediction for Thermal/Chemical Mismatches.

Descriptive Note : Student rept.,

Corporate Author : AIR COMMAND AND STAFF COLL MAXWELL AFB AL

Personal Author(s) : Hodge,James K

PDF Url : ADA182496

Report Date : Apr 1987

Pagination or Media Count : 44

Abstract : Material interfaces are common in heat flux instrumentation and in modern thermal protection systems. Interfaces cause mismatches which can significantly affect convective heat flux. A literature survey on chemical and thermal mismatches with emphasis on experimental data is presented. Data indicate transient variations in heat transfer coefficient. Unsteady boundary layer equations are solved computationally using upwind differences and parabolic grid generation. Results are compared with data, and other computational and analytical solutions, to investigate solution accuracy across a mismatch. By coupling wall conditions, transient variations in heat transfer coefficient at a given deflection angle are computed on Space Shuttle Orbiter materials near an interface during unsteady pitch manuevers. Keywords: flux prediction.

Descriptors :   *FLUX(RATE), *CONVECTION(HEAT TRANSFER), *HEAT FLUX, *HEAT TRANSFER COEFFICIENTS, COMPUTATIONS, SOLUTIONS(GENERAL), COUPLING(INTERACTION), WALLS, PREDICTIONS, LITERATURE SURVEYS, GRIDS, PARABOLAS, MATERIALS, SPACE ENVIRONMENTS, SPACE SHUTTLES, ANGLES, DEFLECTION, INSTRUMENTATION, INTERFACES, ACCURACY, HEAT, PROTECTION, BOUNDARY LAYER, EQUATIONS, UNSTEADY FLOW

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE