Coupling effect on shocked double-gas cylinder evolution
Coupling effect on shocked double-gas cylinder evolution
复制标题
耦合效应对冲击双气瓶演化的影响
DOI：
10.1063/1.5119003
复制
发表时间：
2019-09
影响因子：
4.6
通讯作者：
Ding Juchun
中科院分区：
文献类型：
--
作者：
Zhai Zhigang;Ou Junfeng;Ding Juchun
研究了弱平面激波与双重气柱的相互作用，着重研究了激波后流场的耦合效应。在实验中，利用肥皂膜技术生成了初始条件可控的理想二维不连续双层重气柱，并利用高速纹影摄影技术拍摄了激波流场。考虑了两种不同的初始圆柱中心间距，以突出耦合效应。随着中心间距的减小，耦合效应出现的时间更早，并且变得更加突出。这种耦合作用极大地促进了对称轴附近的内涡相对于外涡的运动，从而形成蘑菇状和扭曲状射流。内涡的融合完全不同于以前实验工作中观察到的内涡彼此分离的现象。定量地得到了上游界面在流向上的运动，并可以通过考虑耦合效应的非线性模型进行预测。此外，基于点涡诱导方程建立了涡模型，可以很好地计算涡之间的相互干扰对涡运动的影响。研究了弱平面激波与双重气柱的相互作用，重点研究了耦合效应对激波后流场的影响。在实验中，利用肥皂膜技术生成了初始条件可控的理想二维不连续双层重气柱，并利用高速纹影摄影技术拍摄了激波流场。考虑了两种不同的初始圆柱中心间距，以突出耦合效应。随着中心间距的减小，耦合效应出现的时间更早，并且变得更加突出。这种耦合作用极大地促进了对称轴附近的内涡相对于外涡的运动，从而形成蘑菇状和扭曲状射流。内涡的融合完全不同于以前实验工作中观察到的内涡彼此分离的现象。定量地得到了上游界面沿流向的运动，并可通过非线性方程进行预测。
Interaction of a weak planar shock wave with double heavy gas cylinders has been investigated, focusing on coupling effect on the post-shock flow. In experiments, the ideal two-dimensional discontinuous double heavy gas cylinders with controllable initial conditions are generated by soap film technique, and the shocked flow is captured by a high-speed schlieren photography. Two different initial center spacings of cylinders are considered to highlight the coupling effect. As the center spacing reduces, the coupling effect occurs earlier and becomes more prominent. The coupling effect greatly promotes the inner vortex motions near the symmetry axis relative to the outer ones, resulting in the formation of the mushroom and twisted jets. The fusion of the inner vortices completely differs from the observation in previous experimental work in which the inner vortices separate from each other. Quantitatively, the motion of the upstream interface in streamwise direction is obtained, and can be predicted by a nonlinear model considering the coupling effect. Besides, a vortex model is proposed based on the induction equation of point vortex, and the effect of the mutual interferences among vortices on the vortex motions can be well evaluated.Interaction of a weak planar shock wave with double heavy gas cylinders has been investigated, focusing on coupling effect on the post-shock flow. In experiments, the ideal two-dimensional discontinuous double heavy gas cylinders with controllable initial conditions are generated by soap film technique, and the shocked flow is captured by a high-speed schlieren photography. Two different initial center spacings of cylinders are considered to highlight the coupling effect. As the center spacing reduces, the coupling effect occurs earlier and becomes more prominent. The coupling effect greatly promotes the inner vortex motions near the symmetry axis relative to the outer ones, resulting in the formation of the mushroom and twisted jets. The fusion of the inner vortices completely differs from the observation in previous experimental work in which the inner vortices separate from each other. Quantitatively, the motion of the upstream interface in streamwise direction is obtained, and can be predicted by a no...
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影响因子：
3
作者：
RICHTMYER, RD
通讯作者：
RICHTMYER, RD
影响因子：
3.7
作者：
Zhai Zhigang;Wang Minghu;Si Ting;Luo Xisheng
通讯作者：
Luo Xisheng
影响因子：
4.6
作者：
J. Jacobs
通讯作者：
J. Jacobs
影响因子：
3.7
作者：
G. Rudinger;L. M. Somers
通讯作者：
G. Rudinger;L. M. Somers
DOI：
10.1103/physreve.67.026307
发表时间：
2003-02
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
A. Rikanati;D. Oron;O. Sadot;D. Shvarts
通讯作者：
A. Rikanati;D. Oron;O. Sadot;D. Shvarts