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DES方法对返回舱气动热环境数值模拟

, PP. 590-594

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Abstract:

脱体涡模拟方法(DES,DetachedEddySimulation)由于结合了湍流模型(RNAS,ReynoldsAveragedNavier-Stokes)和大涡模拟(LES,LargeEddySimulation)两者各自优势,是模拟非定常大分离流动的有效方法.采用基于SA(Spalart-Allmaras)湍流模型的DES方法,对高超声速返回舱外形进行数值模拟,计算所得的返回舱表面压力及热流分布与实验结果吻合,证实了DES方法的优越性.最后,在DES方法中加入可压缩修正,结果证实在高超声速流动中,可压缩修正方法在一定程度上能够提高原始模型的预测性能.

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