模拟舱室内部气云爆炸载荷的不同精度WENO格式比较

徐维铮; 吴卫国

doi:10.11858/gywlxb.20170689

模拟舱室内部气云爆炸载荷的不同精度WENO格式比较

doi: 10.11858/gywlxb.20170689

徐维铮^{1, 2,},
吴卫国^{1, 2}

1.
武汉理工大学高性能舰船技术教育部重点实验室, 湖北武汉 430063
2.
武汉理工大学交通学院船舶、海洋与结构工程系, 湖北武汉 430063

基金项目:

装备预研教育部联合基金（青年人才） 6141A020331

国家自然科学基金 51409202

中央高校基本科研业务费 2016-YB-016

详细信息

作者简介:
徐维铮(1991-), 男, 博士研究生, 主要从事束空间内炸药爆炸场高精度数值计算方法及三维程序开发研究.E-mail:xuweizheng@whut.edu.cn

中图分类号: O381
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出版历程
- 收稿日期: 2017-12-07
- 修回日期: 2017-12-19

Comparisons of Different Precision WENO Schemes for Simulating Blast Load of Gas Cloud Explosion inside a Cabin

XU Weizheng^{1, 2
,},
WU Weiguo^{1, 2}

1.
Key Laboratory of High Performance Ship Technology of Ministry of Education, Wuhan University of Technology, Wuhan 430063, China
2.
Departments of Naval Architecture, Ocean and Structural Engineering, School of Transportation, Wuhan University of Technology, Wuhan 430063, China

摘要

摘要: 为了研究加权本质无振荡（WENO）格式精度对舱室内部气云爆炸载荷的影响规律，基于FORTRAN平台，采用三、五、七、九阶WENO格式，开发了高精度舱室内部气云爆炸三维数值计算程序。选用Sod激波管、激波与熵波相互作用两个经典算例验证了程序编写的可靠性，并初步考察了不同精度WENO格式的计算性能。采用已验证的程序开展了封闭舱室和泄压舱室内部球体气云爆炸的数值模拟，并探讨了WENO格式精度对爆炸载荷的影响规律。研究表明：舱室内部气云爆炸载荷主要包含瞬态冲击波和持续时间较长的准静态超压；WENO格式精度对冲击波载荷影响较大，高阶格式给出更陡峭的峰值，而对形成的准静态超压影响较小。
- WENO格式 /
- 高精度 /
- 低耗散 /
- 舱室内部气云 /
- 爆炸载荷
Abstract: In the present work, we developed a high-resolution 3D code based on the FORTRAN platform to investigate the influence of accuracy of WENO schemes on the blast load generated by gas cloud explosion inside a cabin.The 3th, 5th, 7th and 9th WENO finite difference schemes were implemented in the code to capture the shock waves.Several one dimensional Riemann problems such as Sod shock tube and shock-entropy wave interaction were simulated to investigate the computing performance of the schemes preliminarily and validate the developed code.Then, the validated code was used to conduct the simulation of the gas cloud explosion inside a closed cabin and a venting cabin and the influence of the accuracy of WENO schemes on the blast load was discussed as well.The researches indicate that the blast load generated by gas cloud explosion inside the cabin mainly contains multiple peaks shock waves and long duration quasi-static overpressure.The accuracy of WENO schemes has considerable influence on the blast waves and higher order scheme gives sharper pressure peaks, whereas it has much less influence on the quasi-static overpressure.
- WENO scheme /
- high precision /
- low dissipation /
- gas cloud inside the cabin /
- blast load

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图 1 Sod激波管算例密度曲线及其局部放大图

Figure 1. Density curve and its partially enlarged details for Sod shock tube

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图 2 激波与熵波相互作用算例密度曲线及其局部放大图

Figure 2. Density curve and its partially enlarged details for shock-entropy wave interaction

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图 3 封闭舱室和泄压舱室及其测点分布(单位：mm)

Figure 3. Closed cabin and venting cabin and their gauging points (Unit:mm)

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图 4 爆炸初场及网格分布

Figure 4. Initial condition and mesh distribution

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图 5 舱室内爆炸超压时间历程曲线

Figure 5. Overpressure histories of all the gauging points inside the cabin

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图 6 不同精度WENO格式下封闭舱室内气云爆炸测点No.1处的超压时间历程曲线

Figure 6. Overpressure histories at gauging point No.1 for different schemes in closed cabin

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图 7 不同精度WENO格式下封闭舱室内气云爆炸测点No.1处的超压比较及其局部放大图

Figure 7. Comparison of overpressure at gauging point No.1 for different schemes in closed cabin and its partially enlarged details

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图 8 不同精度WENO格式下泄压舱室内气云爆炸测点No.1处的超压时间历程曲线

Figure 8. Overpressure histories at gauging point No.1 for different schemes in venting cabin

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图 9 不同精度WENO格式下泄压舱室内气云爆炸测点No.1处的超压比较及其局部放大图

Figure 9. Comparison of overpressure at gauging point No.1 for different schemes in venting cabin and its partially enlarged details

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