The Martian atmosphere is characterized by low density and low temperatures, resulting in Mars vehicles typically operating at low Reynolds numbers compressible flow. To obtain the difference in the prediction of such flows by different computational numerical models. Based on Reynolds-averaged Navier–Stokes (RANS) (including the S-A and SST k-ω turbulence models) and large eddy simulation (LES) models, a three-dimensional flow model of Mars environmental blades is established. And this paper numerically studied the triangular airfoil under compressible flow conditions with a low Reynolds number (Re = 3000, Mach = 0.5), considering various angles of attack (AOA). The results show that LES can predict lift coefficient (Cl) and drag coefficient (Cd) well. S-A turbulence model has high fidelity only at low angles of attack, and it is difficult to accurately predict flow separation at high AOA. A similar situation applies to the SST k-ω turbulence. When the AOA increases from 10 to 11°, the increase of lift coefficient is mainly dominated by the suction surface. Moreover, even at an AOA as low as 3°, flow separation was observed on the airfoil surface in the Martian environment.
Numerical Analysis of Low Reynolds Number Compressible Flows with Triangle Airfoil
Springer Aerospace Techn.
International Conference on Advanced Unmanned Aerial Systems ; 2023 ; Harbin, China July 14, 2023 - July 16, 2023
2024-02-01
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Analysis of low Reynolds number airfoil flows
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|Analysis of Low Reynolds Number Airfoil Flows
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|Analysis of low Reynolds number airfoil flows
AIAA | 1995
|Analysis of Low Reynolds Number Airfoil Flows
British Library Conference Proceedings | 1994
|