Journal of Shanghai Jiao Tong University ›› 2023, Vol. 57 ›› Issue (6): 719-727.doi: 10.16183/j.cnki.jsjtu.2022.014

Special Issue: 《上海交通大学学报》2023年“航空航天”专题

• Aeronautics and Astronautics • Previous Articles     Next Articles

Improvement and Numerical Verification of Weighting Strategy for High Precision WCNS Scheme

YANG Qiang, LI Weipeng()   

  1. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2022-01-17 Revised:2022-06-14 Accepted:2022-07-12 Online:2023-06-28 Published:2023-07-05
  • Contact: LI Weipeng E-mail:liweipeng@sjtu.edu.cn.

Abstract:

In order to reveal the complex flow mechanism, a series of high-order precision schemes have been proposed at home and abroad, of which, the weighted compact nonlinear scheme (WCNS) has a good shock capture ability and has been widely used in the numerical simulation of complex flows. However, it has insufficient resolution and large dissipation in the simulation of small-scale flows. In the framework of the WCNS, by using the weighting strategy of the targeted essentially non-oscillatory (TENO) scheme for reference, this paper introduces the new methods of discontinuity detection and template weighting into the construction of the WCNS scheme, and develops a WCNS7-T scheme with a 7-order accuracy. Example tests are conducted through one-dimensional shock tube problem and two-dimensional Riemann problem. By comparing with the traditional WCNS7-Z scheme, the improved performance of the new scheme is verified. The numerical experiments show that the WCNS7-T scheme can better suppress the numerical oscillation near the discontinuity, improve the resolution and shock capture ability, and further reduce the dissipation.

Key words: compressible flow, high precision scheme, shock discontinuity, nonlinear weighting

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