喷嘴内轮廓形状对水射流动态特性影响研究  

Simulation of Dynamic Performance of Impulsive Water Jet Nozzle Based on SIMULINK

作　　者：吕华[1] 雷玉勇[1] 杨振[1] 邹虎[1] 杜文正[1] 

机构地区：[1]西华大学机械工程与自动化学院,成都610039

出　　处：《煤矿机械》2011年第6期92-95,共4页Coal Mine Machinery

基　　金：四川省教育厅资助项目(09ZZ030/09ZB085/09ZA116)

摘　　要：以脉冲水射流喷嘴为研究对象,建立其发射特性的数学模型。喷嘴内轮廓分别采用直线、指数曲线和高阶曲线。应用MATLAB中的动态仿真工具软件包SIMULINK对3种喷嘴出口射流速度和喷嘴内的静压力进行仿真研究。研究表明,喷嘴内水柱的压力和速度沿喷嘴出口方向显著增大,在出口处达到最大值。3种轮廓曲线喷嘴产生的水射流速度的增加率与喷嘴截面积的收缩率成正比;喷嘴内部压力也和喷嘴截面积的收缩率密切相关,收缩最缓慢的指数喷嘴其内部压力最小。Taking the impulsive water jet nozzle as subject investigated,mathematical model of discharge is built.Meanwhile,water-jet outlet speed and static pressure are analyzed with SIMULINK software package in MATLAB.The results show that water-jet outlet speed and static pressure increased significantly along nozzle direction,and they reach maximum at exit.Comparing performance of three different shape nozzles,obtained that rate of velocity increased proportional to rate of contraction with nozzle cross-sectional area.In addition,pressure inside nozzle is also closely related to rate of contraction with nozzle cross-sectional area.The rate of contraction with nozzle cross-sectional area is minimum for Exponential,and internal pressure for which is minimum.

关 键 词：水射流喷嘴 脉冲射流 仿真 SIMULINK 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]