Accession Number : ADA336140

Title :   Simulation of Turbulent Hypersonic Flows

Descriptive Note : Final rept. 1 Jun 96-30 Sep 97

Corporate Author : MINNESOTA UNIV MINNEAPOLIS DEPT OF AEROSPACE ENGINEERING AND MECHANICS

Personal Author(s) : Candler, Graham V.

PDF Url : ADA336140

Report Date : 31 DEC 1997

Pagination or Media Count : 70

Abstract : Direct numerical simulations of turbulent reacting flows were performed to study the interaction between chemical heat release and turbulent fluid motion. A portion of the energy released by exothermic reactions is placed in the compressible mode of turbulent kinetic energy, with very little energy disposed to the incompressible mode. This process results in a positive feedback mechanism, whereby temperature fluctuations are amplified by the chemical reactions. In the case of endothermic reactions, the feedback is negative, resulting in decreased turbulent motion. The results of the simulations were used to develop a model for temperature fluctuations under conditions typical of a hypersonic boundary layer. This model has been validated and is suitable for use in the large eddy simulation of hypersonic turbulent boundary layers.

Descriptors :   *TURBULENT FLOW, *COMPUTATIONAL FLUID DYNAMICS, *HYPERSONIC FLOW, TURBULENCE, EDDIES(FLUID MECHANICS), TURBULENT BOUNDARY LAYER, COMPRESSIBLE FLOW, KINETIC ENERGY, SUPERSONIC COMBUSTION, HYPERSONIC CHARACTERISTICS, EXOTHERMIC REACTIONS, BOUNDARY LAYER FLOW, ENDOTHERMIC REACTIONS.

Subject Categories : Fluid Mechanics
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE