Numerical simulation of two-phase flow field in underwater sealing device based on dynamic mesh  

基于动网格的水下发射装置两相流研究（英文）

作　　者：张学伟[1] 李强[1] 吕梦柔 

机构地区：[1]中北大学机电工程学院,山西太原030051

出　　处：《Journal of Measurement Science and Instrumentation》2015年第3期253-257,共5页测试科学与仪器（英文版）

基　　金：National Natural Science Foundation of China(No.51175481)

摘　　要：In order to speed underwater launch of minor-caliber weapons,a sealing device can be set in front of underwater muzzle to separate water,preventing the muzzle from water immersion.By establishing and simplifying the model of underwater weapon sealing device and unstructured mesh computing domain model based on computational fluid dynamics（CFD）,dynamic mesh and user defined function（UDF）,the N-S equation is solved and the numerical analysis and calculation of the complex two-phase flow inside the sealing device are carried out.The results show that the gas discharged from the sealing device is conducive to the formation of the projectile supercavity.When the projectile is launched at 5munder water,the shock wave before and after the projectile has impact on the box body up to 100 MPa,therefore the sealing device must be strong enough.The research results have the vital significance to the design of underwater weapon sealing device and the formation of the projectile supercavitation.

关 键 词：two-phase flow SUPERCAVITATION sealing device computational fluid dynamics（CFD） dynamic mech 

分 类 号：O359[理学—流体力学] TJ6[理学—力学]