喷嘴入口压力对水力空化倒药效率的影响研究  

Study on Effect of Nozzle Inlet Pressure on Efficiency of Explosive Removal using Hydrodynamic Cavitation

作　　者：满海涛 罗兴柏[1] 丁玉奎[1] 闫青春 

机构地区：[1]军械工程学院 [2]72373部队

出　　处：《计算机仿真》2016年第3期13-17,共5页Computer Simulation

摘　　要：喷嘴入口压力是影响空化产生的重要参数,空化强度的大小直接影响倒空弹药装药的效率。为解决空化流场在不同入口压力条件下的变化规律问题,利用FULENT软件,对淹没条件下缩放型喷嘴内外的流场特性进行仿真分析,得到了流场内汽含率和速度的分布规律,利用设计的试验系统,在不同压力条件下,对某型照明矩进行冲蚀研究。研究结果表明:缩放型喷嘴喉部发生明显的压力差,加剧了空化现象的产生,空化流场随着入口压力的增大,汽含率和流体速度逐步变大,空化强度越来越强,对照明矩冲蚀效果越来越好。Nozzle inlet pressure is the important parameter to the effi- ciency of the cavitation. The intensity of the cavitation affects the efficiency of explosive removal. In order to explore the basic law of the cavitation flow field in the process of explosive removal based on the technology of hydrodynamic cavitation on the different inlet pressure, the flow field characteristics of submerged cavitating water jet convergent-di- vergent nozzle inside and outside are simulated by FLUENT software, the cavity density and velocity in flow field are obtained, and the hydrodynamic cavitation explosive removal experiment system is used to study the erosion of the certain illuminant candle in different inlet pressures. The results show that the acntely cavitation phenomenon occurs in the convergent-divergent nozzle throat where exists the obvious pressure difference. With the increase of the inlet pressure, the cavity density and velocity gradually become bigger, the cavitation intensity is more and more strong, and the effectiveness of erosion illuminant candle becoms better.

关 键 词：水力空化 倒药 数值仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]