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二维超声速混合层的大涡模拟
引用本文:孙明波,梁剑寒,金亮,侯中喜,王振国.二维超声速混合层的大涡模拟[J].国防科技大学学报,2005,27(5):86-90.
作者姓名:孙明波  梁剑寒  金亮  侯中喜  王振国
作者单位:国防科技大学,航天与材料工程学院,湖南,长沙,410073
基金项目:国家部委基金资助项目(51413040901KG0145)
摘    要:对二维超声速混合层流动进行大涡模拟。采用五阶精度的WENO格式求解大尺度涡的控制方程,小尺度涡的作用采用Smagorinsky亚格子模型进行模拟。模拟结果再现了二维超声速混合层拟序结构,计算得到了涡组对、合并等现象。通过对流场不同位置压力振荡历程的频谱分析,对超声速混合层中的谐波变化规律作了初步探讨。计算得到的速度剖面的时均统计结果与实验结果相比,吻合程度较好。

关 键 词:超声速混合层  大涡模拟  WENO格式
文章编号:1001-2486(2005)05-0086-05
收稿时间:4/6/2005 12:00:00 AM
修稿时间:2005年4月6日

The Large Eddy Simulation of Two-Dimensional Supersonic Mixing Layer
SUN Mingbo,LIANG Jianhan,JIN Liang,HOU Zhongxi and WANG Zhenguo.The Large Eddy Simulation of Two-Dimensional Supersonic Mixing Layer[J].Journal of National University of Defense Technology,2005,27(5):86-90.
Authors:SUN Mingbo  LIANG Jianhan  JIN Liang  HOU Zhongxi and WANG Zhenguo
Abstract:Large eddy simulations are conducted to investigate the coherent structures of a two-dimensional supersonic mixing layer.The Governing equations of large scale eddies are solved with fifth-order WENO scheme and the effect of small scale eddies is simulated with Smagorinsky subgrid scale model.The results show that the development procedure of large structures and reveal the behavior of large eddies.Frequency spectrum analysis of the unsteady pressure data is performed to investigate the acoustic characteristics of different streamwise location in the mixing layer.Time-averaged velocity profiles obtained from the simulation are consistent with the experimental data.
Keywords:supersonic mixing layer  large eddy simulation  WENO scheme
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