Z型扩散室内爆炸冲击波传播规律  

Propagation Law of Shock Wave jn Z-shaped Diffusion Chamber

作　　者：吴张君 王雪明 余雯君 邓树新[1] 陈建宇 晋冬艳 于冰冰 WU Zhangjun;WANG Xueming;YU Wenjun;DENG Shuxin;CHEN Jianyu;JIN Dongyan;YU Bingbing(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;Institute of Defense Engineering,Academy of Military Science,Beijing 100036,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]军事科学院国防工程研究院,北京100036

出　　处：《兵工学报》2023年第S01期160-169,共10页Acta Armamentarii

基　　金：江苏省自然科学基金项目(BK20210319)。

摘　　要：基于LS-DYNA软件建立Z型扩散室三维数值计算模型,探讨扩散室在不同特征参数入射冲击波作用下的消波效果,并探讨了不同特征尺寸对扩散室消波效果的影响。研究结果表明:长短持时对扩散室的消波效果有明显影响,扩散室在短持时冲击波作用下的消波效果比长持时条件下提高8%;扩散室的消波效果会随着入射冲击波峰值强度的增大而提高,当入射冲击波的峰值强度大于0.9 MPa后提高作用不明显;当扩散比和长径比为5时扩散室的消波性能最佳;扩散室扩散比的增加对扩散室的消波效果有明显增强作用;长径比的增强对扩散室消波效果的作用规律不明显。In this paper,a three-dimensional numerical calculation model of Z-shaped diffusion chamber is established based on LS-DYNA.The wave dissipation effect of the diffusion chamber under the impact of incident shock wave with different characteristic parameters is discussed,and the influences of different feature sizes of diffusion chamber on the wave dissipation efffect are studied.The results show that the wave dissipation effect of diffusion chamber under the impact of shock wave with short duration is significantly affected,and the wave dissipation effect of diffusion chamber under the impact of shock wave with short duration is 8%higher than that with long duration.The wave dissipation effect of diffusion chamber increases with the peak intensity of incident shock wave,but the improvement in wave dissipation effect is not obvious when the peak intensity of incident shock wave is greater than 0.9 MPa.The wave dissipation performance of diffusion chamber is the best when the diffusion ratio and length-to-diameter ratio are 5.The increase in the diffusion ratio of diffusion chamber has a significant influence on its wave dissipation effect.The increase in length-to-diameter ratio has no obvious effect on the wave dissipation effect of diffusion chamber.

关 键 词：扩散室 冲击波 传播规律 消波 

分 类 号：O383[理学—流体力学]