超声速湍流边界层中横向声速喷流的混合LES/RANS模拟

陈逖; 刘卫东; 孙明波; 范晓樯; 梁剑寒

超声速湍流边界层中横向声速喷流的混合LES/RANS模拟

国防科学技术大学航天与材料工程学院, 长沙 410073

基金项目: 国家自然科学基金(10802096)

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出版历程
- 收稿日期: 2012-11-24
- 刊出日期: 2013-11-28

Hybrid LES/RANS simulation of transverse sonic injectionin supersonic turbulent boundary layer

College of Astronautics and Material Engineering, National University of Defense Technology, Changsha 410073, China

摘要

摘要: 通过对超声速湍流边界层中横向声速喷流的计算,对一种混合大涡/雷诺平均Navier-Stokes(LES/RANS)模拟方法进行了测试,该方法采用一个依赖于到壁面的距离及当地湍流参数的混合函数结合两方程k-ω SST(shear stress transport)湍流模型和混合尺度亚格子模型来封闭湍流项.计算结果表明:混合模拟方法能够捕捉到喷流/湍流边界层相互干扰的非定常大尺度结构,且对分离区长度、壁面静压峰值和膨胀区静压分布的计算精度要高于RANS(Reynolds-averaged Navier-Stokes)方法.
- 超声速湍流边界层 /
- 横向声速喷流 /
- 混合大涡/雷诺平均Navier-Stokes模拟方法
Abstract: A hybrid large eddy simulation/Reynolds-averaged Navier-Stokes (LES/RANS) method was tested by computing transverse sonic injection in supersonic turbulent boundary layer. The method combined two-equation k-ω SST (shear stress transport) turbulence model and a mixed-scale sub-grid scale model for turbulence closure depending on wall distance and a blending function of local turbulent parameters. The results show that the hybrid method can capture the unsteady large scale structures of the jet/turbulent boundary-layer interaction. Also, it provides better predictions of separation region length, wall static pressure peak value and static pressure distribution in the expansion regions than the RANS method.

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参考文献(16)

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