| 耦合内弹道过程的膛口流场数值模拟与分析 |
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| 引用本文： | 郁伟,朱斌,张小兵.耦合内弹道过程的膛口流场数值模拟与分析[J].南京理工大学学报(自然科学版),2009,33(3). |
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| 作者姓名： | 郁伟 朱斌 张小兵 |
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| 作者单位： | 南京理工大学,动力工程学院,江苏,南京,210094 |
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| 基金项目： | 教育部优秀人才支持计划，高校博士学科点基金，江苏省自然科学基金 |
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| 摘 要： | 为提高武器精度,模拟弹丸射入膛内后的膛口流场,耦合内弹道过程分析弹丸射出炮口前的初始流场和射出后的流场变化.采用内弹道经典模型计算膛内弹后气体流场,建立二维轴对称气体动力学模型计算弹前气体及膛口流场,通过弹前阻力将二者同步耦合计算.计算过程采用非结构网格方法,同时考虑运动弹丸的影响,计算结果与实验流场相吻合.计算结果捕捉到弹丸出炮口后在膛口形成清晰的瓶状波系.分析得到弹丸出炮口后1.5 ms时刻炮膛内外的马赫数轴向分布;此时火药气体在膛外膨胀的最大马赫数可以达到6.32;火药经过激波后气体速度迅速下降到声速以下.由于激波的作用,在激波前后压强会产生阶跃.
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| 关 键 词： | 膛口 流场 内弹道 非结构网格 耦合 弹丸 |
Numerical Simulation and Analysis of Muzzle Flow Field Coupling with Interior Ballistic Process |
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| YU Wei,ZHU Bin,ZHANG Xiao-bing.Numerical Simulation and Analysis of Muzzle Flow Field Coupling with Interior Ballistic Process[J].Journal of Nanjing University of Science and Technology(Nature Science),2009,33(3). |
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| Authors: | YU Wei ZHU Bin ZHANG Xiao-bing |
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| Institution: | School of Power Engineering;NUST;Nanjing 210094;China |
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| Abstract: | The muzzle flow fields after projectiles are driven inside guns are simulated to enhance firing precision.Coupled with interior ballistics process,the initial flow field and the flow field change before and after the projectile shoots out are analyzed.The classical model of interior ballistics is established to simulate the gas in bore,and an aerodynamic model of two dimension and axially symmetry is established to simulate the muzzle flow field.The two models are coupled by the resistance of the pressure i... |
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| Keywords: | gun muzzles flow fields interior ballistics unstructured grids coupling projectiles |
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