Turbulent flow modelling using EARSM on parallel computers

• Autorzy: Sillen M.
• Języki publikacji: EN

Abstrakty

EN

The compressible Navier-Stokes equations are solved numerically for turbulent transonic aerospace applications on parallel computers. The turbulence is modelled by an Explicit Algebraic Reynolds Stress Model (EARSM). Expressing the EARSM as an extension of an eddy-viscosity model makes the implementation straightforward in a flow solver with existing two-equation eddy-viscosity models. The k-w transport equations are used as a platform for the model. The EARSM approach significantly improves the shock position for transonic flow over wings without substantial increase in computational cost. Industrial use of advanced flow modelling requires a short turn-around time of computations. This is enabled through the use of parallel computers. To achieve good parallel performance the computational load has to be evenly distributed between the processors of the parallel machine. A heuristic algorithm is described for distributing and splitting the blocks of a structured multiblock grid for a good static load balance. Speed-up results are presented for turbulent flow around a wing on a number of parallel platforms.

Słowa kluczowe

EN

aviation; computational fluid dynamics CFD; aerodynamics of airplanes

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2001
• Tom: Vol. 5, No 2
• Strony: 247--260
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Sillen M.

• Saab Aerospace, SE-581 88 Linkoping, Sweden

Bibliografia

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• [2] Wilcox D C 1993 Turbulence modeling for CFD DCW Industries Inc.
• [3] Kok J 2000 AIAA Journal 38 (7)
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• [7] Jameson A 1988 Pure and Applied Mathematics XLI 507
• [8] Wallin S 1999 An efficient explicit algebraic Reynolds stress k-! model (EARSM) for aeronautical applications FFA TN 1999-71
• [9] Ålund A, L¨otstedt P and Sill´en M 1997 Computers & Fluids 26 (7) 775
• [10] Cock P H, MacDonald M A and Firmin M C P 1979 Aerofoil 2822 – Pressure distribution, boundary layer and wake measurements AGARD AR 138
• [11] Horsten J J, Den Boer R G and Zwaan R J 1983 Unsteady transonic pressure measurements on a semi-span wind tunnel model of a transport-type supercritical wing (LANN model) AFWAL-TR-83-3039