| 球形重质气体物理爆炸特性 |
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| 引用本文： | 薛大文,陈志华,韩珺礼.球形重质气体物理爆炸特性[J].爆炸与冲击,2014,34(6):759-763. |
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| 作者姓名： | 薛大文 陈志华 韩珺礼 |
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| 作者单位： | 1.南京理工大学瞬态物理重点实验室，江苏 南京 210094 |
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| 基金项目： | the National Natural Science Foundation of China，国家自然科学基金面上项目，2012年江苏省研究生科研创新计划项目 |
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| 摘 要： | 基于大涡模拟方法，结合高阶混合格式，对高压重质的SF6球形气云在空气中爆炸进行了模拟。数值模拟表明，爆炸产生的激波经过气体分界面时分为透射激波以及反射稀疏波，透射激波导致气体分界面处Richtmyer-Meshkov失稳增强，从而加速了2种气体的混合，而反射的稀疏波经过汇聚，在球心处形成二次激波，在该强激波作用下，流场区域基本呈现湍流形态。
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| 关 键 词： | 爆炸力学 Richtmyer-Meshkov不稳定性 大涡模拟 SF6 |
| 收稿时间： | 2013-04-03 |
Physical characteristics of circular heavy gas cloud explosion |
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| Xue Da-wen,Chen Zhi-hua,Han Jun-li.Physical characteristics of circular heavy gas cloud explosion[J].Explosion and Shock Waves,2014,34(6):759-763. |
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| Authors: | Xue Da-wen Chen Zhi-hua Han Jun-li |
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| Institution: | 1.State Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China2.School of Shipping and Ports Architecture Engineering, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China3.Beijing Research Institute of Mechanical and Electrical Technology, Beijing 100012, China |
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| Abstract: | The explosion of the high pressure, dense gas (SF6) in a circular shape was explored with the use of large eddy simulation (LES), the hybrid high-order schemes were employed to solve the LES equations.The simulated results show that while the shock wave exploding from SF6 gas to air, the incident shock bifurcates into the transmitted shock and the reflected rarefaction wave.The Richtmyer-Meshkov instabilities occur as the transmitted shock accelerates the gas interface, the rarefaction wave moves inward first and converges at the origin, this will generate a strong circular reflected shock which makes the flow field become fully turbulent. |
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| Keywords: | mechanics of explosion Richtmyer-Meshkov instability large eddy simulation SF6 |
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