Accession Number : ADA194251

Title :   Low Density Real Gas Flows about Hypersonic Vehicles.

Descriptive Note : Interim rept. 25 Sep 86-25 Sep 87,

Corporate Author : BOEING AEROSPACE CO SEATTLE WA COMPUTATIONAL FLUID DYNAMICS GROUP

Personal Author(s) : Hoffman, J J ; Wong, R S ; Bussing, T R ; Birch, S F

PDF Url : ADA194251

Report Date : Mar 1988

Pagination or Media Count : 109

Abstract : Phase I results include selection of the three components of the computational of the computational algorithm (a Navier-Stokes solution algorithm, a chemistry solution algorithm, and vectorization and parallel processing requirements for both algorithms). Development of a nonequilibrium air chemistry reaction model is included, as well as studies of leeside models, turbulence models, and wall catalysis effects appropriate to the hypersonic flows to be considered. Mach 20 test cases were performed using the Navier Stokes and chemistry algorithms, and a comprehensive sensitivity study was completed for the selection of an air chemistry model. Transport property calculations are also discussed. The components of the computational algorithm developed during Phase I will be assembled during Phase II into a unified computer code capable of accurately and efficiently calculating low density real gas flows about hypersonic vehicles. Keywords: Chemical reaction model; Coupled Navier-Stokes/chemistry; Electron density; Flux splitting; Gauss-Seidel line relaxation; Hypersonic flow; Implicit algorithm; Nonequilibrium air chemistry; Parallel processing.

Descriptors :   *ATMOSPHERIC CHEMISTRY, *HYPERSONIC FLOW, *BOUNDARY LAYER FLOW, ALGORITHMS, CATALYSIS, CHEMICAL REACTIONS, CHEMISTRY, COMPUTATIONS, COMPUTER PROGRAMS, COUPLING(INTERACTION), ELECTRON DENSITY, FLUX(RATE), HYPERSONIC VEHICLES, MODELS, NAVIER STOKES EQUATIONS, NONEQUILIBRIUM FLOW, PARALLEL PROCESSING, PHASE, REQUIREMENTS, SENSITIVITY, SOLUTIONS(GENERAL), SPLITTING, TRANSPORT PROPERTIES, TURBULENCE, WALLS, COMPUTER PROGRAMMING

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE