| 火炮弹丸底凹结构流场仿真及其减阻机理分析 |
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| 引用本文： | 陆海波,崔国亮,张海涛,马强.火炮弹丸底凹结构流场仿真及其减阻机理分析[J].四川兵工学报,2016(9). |
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| 作者姓名： | 陆海波 崔国亮 张海涛 马强 |
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| 作者单位： | 南京炮兵学院 自行火炮系,南京,211132 |
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| 摘 要： | 针对火炮弹丸底凹结构的减阻效果展开研究，基于 N －S 方程求解，得到了底凹弹弹丸在超声速流场条件下的绕流流场参数分布以及弹丸的气动阻力，讨论了不同底凹深度对弹丸流场、减阻效果的影响，分析了底凹结构减阻机理；研究发现：位于弹丸底部的回流流动对底凹结构的减阻效果起决定性作用；在超声速条件下，底凹结构越深，底凹弹气动阻力越小。
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| 关 键 词： | 底凹弹丸 减阻 超声速 数值模拟 |
Flow Field Simulation and Drag Reducing Mechanism Analysis of Projectile with Base Cavity |
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| Abstract: | The drag reducing effect of projectile with base cavity was investigated numerically.Based on the solving of the Navier-Stokes (N-S)equations,the distributions of the flow field parameters and the aerodynamic drag were obtained.The effect of the base cavity length on the flow field and the drag reducing were discussed.The results show that the recirculation region plays a pivotal role for the reduction of the drag.Under the condition of supersonic,the deeper the bottom concave structure,the bottom concave playing the aerodynamic drag is smaller. |
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| Keywords: | projectile with base cavity drag reducing supersonic numerical simulation |
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