The Flow Field Analysis And Simulation Research On Supercavitating Projectile

When weapon is launched, it should be used in environment of air and water. It is necessary for weapon design to take the air and water movement into account. The muzzle flow field process and the influence on projectile have been researched sufficiently and it is different from underwater flow field because the water density is800times of the air density firstly.Supercavitation theory is a new method which realizes high speed navigation in water environment. The main principium of minishing viscous drag and accreting range is using water vapor which comes form water boiloff to isolate moving body from water and minish moving body bedewing area and then minish viscous drag.Firstly, the article utilize supercavitation theory and establish a underwater-gun system for using in underwater to destroy mine or fish torpedo. Based on American simular weapon system and30mm caliber, the article design a underwater-gun and ammunition system. Then the paper adopts the computational fluid dynamics theory to establish the control equations of the two-phasic flow and supercavitation in FLUENT simulation analysis. The Fluent software and two-phasic flow model are used to simulate the process of powder gas removing the water in gun and the simulation result validate the feasibility of design by volume proportional nephogram of different phasic.Lastly, the paper takes water as media to simulate the process of cavity and researches the influence of different factor on it and discusses the drag reduction of cavity and range. That is the value of using cavity.