二维激波与剪切层相互作用的直接数值模拟研究

刘旭亮; 张树海

doi:10.6052/0459-1879-12-106

二维激波与剪切层相互作用的直接数值模拟研究

doi: 10.6052/0459-1879-12-106

刘旭亮,
张树海^,

中国空气动力研究与发展中心, 空气动力学国家重点实验室, 四川绵阳621000

基金项目: 国家自然科学基金(11172317, 91016001) 和国家重点基础研究发展计划(973 计划)(2009CB724104) 资助项目.

详细信息

通讯作者:
张树海

中图分类号: V211.3
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- 文章访问数: 1926
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- 被引次数: 0
出版历程
- 收稿日期: 2012-04-19
- 修回日期: 2012-10-23
- 刊出日期: 2013-01-18

DIRECT NUMERICAL SIMULATION OF THE INTERACTION OF 2D SHOCKWAVE AND SHEAR LAYER

Liu Xuliang,
Zhang Shuhai^,

State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Sichuan Mianyang 621000, China

Funds: The project was supported by the National Natural Science Foundation of China (11172317, 91016001) and Major State Basic Research Development Program of China (2009CB724104).

摘要

摘要: 采用五阶weighed esseritially non-oscillatory (WENO) 格式和三阶total variation diminishing (TVD) Runge-Kutta 格式, 通过求解二维非定常Navier-Stokes 方程, 直接数值模拟了激波与剪切层相互作用, 目的在于揭示激波与剪切层相互作用过程中噪声产生的机理. 研究发现:(1) 当入射激波穿过剪切层时, 剪切层中心位置向下层区域偏移;(2) 入射激波穿过剪切层产生小激波, 在小激波与剪切层接触点处产生声波并向外辐射;(3) 反射激波穿过剪切层后形成了分段弧状激波;(4) 当反射激波穿过剪切层时, 激波在鞍点处泄漏并向外辐射声波, 这是一种激波泄漏机制.
- 激波 /
- 剪切层 /
- 直接数值模拟 /
- 激波噪声
Abstract: Direct numerical simulation (DNS) of the interaction of shock wave and shear layer was performed. The compressible unsteady two-dimensional Navier-Stokes equations were solved using the fifth-order WENO scheme combined with the third-order TVD Runge-Kutta scheme. The purpose of this paper is to reveal the mechanism of sound generation in the interaction of shock wave and shear layer. The results show that: (1) When incident shock wave is passing through the shear layer, the center of the vortex cores is shifted towards the lower side; (2) The interaction of incident shock wave and shear layer generates shocklet, and then acoustic wave is generated and radiated at the locus of contact of shocklet and shear layer; (3) Several arc-shocks are formed after reflected shock wave passing through shear layer; (4) When reflected shock wave is passing through shear layer, shock wave is leaking in the braid region and shock-associated noise is generated at the saddle points between vortices. This is a form of shock leakage mechanism.
- shock wave /
- shear layer /
- DNS /
- shock-associated noise

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参考文献(38)

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