| Richtmyer-Meshkov不稳定性强化混合参变机理 |
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| 作者姓名： | 王兵 卢梦 |
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| 作者单位： | 清华大学航天航空学院, 北京 100084 |
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| 摘 要： | 在不同参数条件下, 计算分析了H2O和N2等混合物界面上激波诱导Richtmyer-Meshkov(R-M)不稳定性过程.采用有限差分方法数值求解了二维可压缩Navier-Stokes方程, 对流项以5阶特征紧致-WENO混合格式离散, 输运项以6阶对称紧致格式离散, 时间方向以3阶显式Runge-Kutta方法推进.研究表明, 界面振幅和激波强度增大, 均可增强界面附近涡量场, 强化混合.
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| 关 键 词： | 激波加速界面 紧致格式 激波强度 涡合 拟涡能 |
| 收稿时间： | 2016-07-24 |
Mixing-Enhancement Mechanism of Richtmyer-Meshkov Instability at Different Parameters |
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| Affiliation: | School of Aerospace, Tsinghua University, Beijing 100084, China |
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| Abstract: | The evolution of Richtmyer-Meshkov(R-M) instability induced by a shock wave on a H2O and N2 mixture interface was numerically analyzed. Two-dimensional compressible Navier-Stokes equations were discretized and solved by finite difference method. The convective terms were discretized by the 5th-order characteristic-wise hybrid compact-WENO scheme, the transportive terms were discretized by the 6th-order symmetric compact scheme, and a 3rd-order explicit Runge-Kutta method was employed for time marching. Results show that both interface amplitude and shock wave strength can largely affect the mixing procedure. When the interface amplitude and shock wave strength increase, the vorticity field near the interface is strengthened and hence the mixing is enhanced. |
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