中文摘要：

为了研究无后坐炮的流场特性,利用有限体积法、AUSM＋格式及嵌入网格技术,对包含运动弹丸的某无后坐炮的前、后复杂流场进行了数值模拟。根据数值结果,绘制了无后座炮前后流场的计算阴影图和炮口周围超压峰值等值线图,详细讨论了无后座炮膛口流场及尾喷管流场的形成与发展;根据有关标准,分析了炮班成员的安全区域。这些结果对于理解无后坐炮的流场特点,预测冲击波对炮手的危害有一定的参考意义。

英文摘要：

In order to study complex characteristics of the flow field of a recoilless gun,the front and back flow field of the recoilless gun with moving projectile is numerically simulated using the finite volume method,AUSM＋scheme and chimera grids technique.According to the simulation results,sequential computational shadowgraphs and overpressure contours around the gun are plotted.The formation and development processes of the whole flow fields are discussed in detail.In terms of the relevant military standards,the safety zones for the gun crew are also analyzed.These results are very significant for understanding the characteristics of the flow field of the recoilless gun and predicting the blast damage on the gun crew.