球形重质气体物理爆炸特性

薛大文; 陈志华; 韩珺礼

doi:10.11883/1001-1455(2014)06-0759-05

球形重质气体物理爆炸特性

doi: 10.11883/1001-1455(2014)06-0759-05

薛大文^{1, 2},
陈志华^1, ,,
韩珺礼^{1, 3}

1.
南京理工大学瞬态物理重点实验室，江苏南京 210094
2.
浙江海洋学院海运与港航建筑工程学院, 浙江舟山 316022
3.
北京机电研究所，北京 100012

基金项目: 国家自然科学基金面上项目(11272156); 2012年江苏省研究生科研创新计划项目(CXZZ12_0179)

详细信息

作者简介:
薛大文(1986—), 男, 博士研究生

中图分类号: O381
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出版历程
- 收稿日期: 2013-04-03
- 修回日期: 2013-09-05
- 刊出日期: 2014-11-25

Physical characteristics of circular heavy gas cloud explosion

Xue Da-wen^{1, 2},
Chen Zhi-hua^{1
, ,},
Han Jun-li^{1, 3}

1.
State Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
School of Shipping and Ports Architecture Engineering, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China
3.
Beijing Research Institute of Mechanical and Electrical Technology, Beijing 100012, China

Funds: Supported bythe National Natural Science Foundationof China (11272156)

More Information

Corresponding author: Chen Zhi-hua, chenzh@mail.njust.edu.cn

摘要

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。
- 爆炸力学 /
- Richtmyer-Meshkov不稳定性 /
- 大涡模拟 /
- SF₆
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.
- mechanics of explosion /
- Richtmyer-Meshkov instability /
- large eddy simulation /
- SF₆

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图 1 不同时刻密度等值面

Figure 1. Density isosurfaces shown at different times

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图 2 流场波系结构及界面随时间的变化

Figure 2. Evolution of the shock wave structure and interface in the flowfield

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图 3 径向压力变化

Figure 3. Pressure distributions along the radius at different times

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图 4 气体界面，透射激波以及稀疏波轨迹

Figure 4. Trajectories of gas interface, transmitted shock and reflected wave

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图 5 二次激波与流场作用过程

Figure 5. Processes of the interaction between reshock and the flowfield

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