Low-diffusion preconditioning scheme for numerical simulation of low-speed flows past airfoil |
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| Authors: | Qian Xiang Song-ping Wu Chun-hian Lee Ning cao |
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| Institution: | [1]School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, P. R. China [2]National Laboratory for Computational Fluid Dynamics, Beihang University, Beijing 100191, P. R. China [3]Ministry of Education Key Laboratory of Fluid Mechanics, Beihang University, Beijing 100191, P. R. China |
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| Abstract: | The preconditioning technique can address the stiffness of a low Mach number flow, while its stability is poor. Based on the
conventional preconditioning method of Roe's scheme, a low-diffusion scheme is proposed. An adjustable parameter is introduced
to control numerical dissipation, especially over the dissipation in the boundary layer and extremely in a low speed region.
Numerical simulations of the low Mach number and low Reynolds number flows past a cylinder and the low Mach number and high
Reynolds number flows past NACA0012 and S809 airfoils are performed to validate the new scheme. Results of the three tests
well agree with experimental data, showing the applicability of the proposed scheme to low Mach number flow simulations. |
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| Keywords: | numerical simulation preconditioning steady flow airfoil |
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