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HLLC黎曼解法器的优化与应用

DOI: 10.15918/j.tbit1001-0645.2015.04.020

Keywords: 特征波速 HLLC黎曼解法器 优化与应用 音障问题

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Abstract:

研究适合一般状态方程的HLLC近似黎曼解法器的音速熵故障问题. 受Oleinik熵条件的启发,基于HLL与HLLC黎曼解法器自身的特点及一阶迎风格式的数值黏性,利用HLL黎曼解法器的思想,通过设定阈值克服了HLLC黎曼解法器的跨音速稀疏波内的音障问题,使该解法器是整体满足熵条件的正格式,并应用到一步ALE方法中计算多介质问题. 数值算例显示了优化的特性

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