动态间断装配法模拟斜激波壁面反射

doi:10.7527/S1000-6893.2015.0254

Abstract

Abstract:

A new shock-fitting technique called the moving discontinuity fitting algorithm has been proposed, which is based on the unstructured moving grids technique and boundary shock fitting technique. No matter the incident shock wave or reflected shock wave is treated as a boundary of a flow field, the velocity of shock moving is determined by Rankine-Hugoniot(R-H) relations. The shock wave is fitted as a part of the unstructured moving grids. And the unstructured moving grids technique is used to make the motion of shock waves come true. A problem about shock waves reflection on a straight wall is simulated using this new technique. Compared with the result obtained by shock capturing technique in detail, the result obtained by the new shock fitting is better, though they are similar in general. Using this method, not only incident shock waves but also the reflection shock waves can be fitted. This method shows that the boundary shock fitting technique is also capable of simulating shock interaction even Mach reflection.

Key words: shock wave, unstructured moving grids, shock fitting, supersonic flow, shock wave interactions

CLC Number:

V211.3

LIU Jun, ZOU Dongyang, DONG Haibo. A moving discontinuity fitting technique to simulate shock waves impinged on a straight wall[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(3): 836-846.

References

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A moving discontinuity fitting technique to simulate shock waves impinged on a straight wall

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