| 冲击波超压峰值的数值计算 |
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| 引用本文： | 王杨,郭则庆,姜孝海.冲击波超压峰值的数值计算[J].南京理工大学学报(自然科学版),2009,33(6). |
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| 作者姓名： | 王杨 郭则庆 姜孝海 |
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| 作者单位： | 南京理工大学,瞬态物理国家重点实验室,江苏,南京,210094 |
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| 基金项目： | 国防科技重点实验室基金 |
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| 摘 要： | 为提高冲击波超压峰值的数值计算精度,该文根据二阶Roe格式,模拟了3种不同粗细网格条件下的点爆炸流场.基于高精度的数值计算格式,利用冲击波的发展规律求得波阵面速度,再由兰金雨贡纽方程计算得到超压峰值.并与数值模拟的直接超压峰值进行了对照讨论.结果表明随着网格加密,数值直接超压峰值不断逼近采用冲击波传播速度获得的超压峰值,而后者几乎不变.
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| 关 键 词： | 冲击波 Roe格式 冲击波阵面 兰金雨贡纽方程 超压峰值 |
Numerical Investigations on Peak Overpressure of Blast Wave |
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| WANG Yang,GUO Ze-qing,JIANG Xiao-hai.Numerical Investigations on Peak Overpressure of Blast Wave[J].Journal of Nanjing University of Science and Technology(Nature Science),2009,33(6). |
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| Authors: | WANG Yang GUO Ze-qing JIANG Xiao-hai |
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| Abstract: | In order to improve the computation precision of peak overpressure of the blast wave, three point explosion cases are simulated numerically with different fine grids by using the second-order Roe scheme. Based on the numerical computational scheme of the high-precision, the blast propagation speed is calculated according to the development law of a blast wave. The indirect peak overpressure is calculated by using Rankine-Hugoniot equation and compared with the direct peak overpressure calculated by numerical simulation. The comparative result indicates that: with the increase of the mesh refinement, the direct numerical peak overpressure gradually approaches the indirect peak overpressure obtained by a blast propagation speed, while the latter is almost constant. |
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| Keywords: | blast waves Roe scheme shock fronts Rankine-Hugoniot equation peak overpressure |
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