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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (5): 120543-120543.doi: 10.7527/S1000-6893.2016.0241

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Properties of Osher flux with entropy fix in high-order WCNS

ZHU Huajun1, YAN Zhenguo1, LIU Huayong1, MAO Meiliang1,2   

  1. 1. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    2. China Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China
  • Received:2016-06-17 Revised:2016-08-25 Online:2017-05-15 Published:2016-09-26
  • Supported by:

    National Natural Science Foundation of China (11301525,11372342 and 11572342)

Abstract:

Osher flux with a multi-dimensional entropy fix is applied for high order weighted compact nonlinear scheme (WCNS). The entropy fix technique is used to mainly improve the dissipation on the interfaces perpendicular to the shock wave, and can thus improve shock wave stability and may not influence contact resolution. The properties of the Osher flux in high order WCNS schemes are studied. Numerical investigations are made to test properties of shock wave stability, accuracy of viscous heating computation, and boundary layer and shock boundary layer interaction calculation abilities. Comparisons with Steger-Warming flux and Roe flux are also made. Numerical results show that the Osher flux with entropy fix is more robust than Roe flux with Harten fix in shock capturing, and is better in viscous heating computation than Steger-Warming flux. These results illustrate that high order WCNS based on Osher flux with entropy fix is robust in caputuring shock waves, can get accurate heat flow prediction and has good simulation of the boundary layer.

Key words: flux, high order WCNS, shock wave stability, heat flow computation, boundary layer calculation

CLC Number: