机械科学与技术2017，Vol.36Issue(12)：1816-1822,7.DOI:10.13433/j.cnki.1003-8728.2017.1203
双腔室自振脉冲喷嘴数值分析与实验研究
Numerical Analysis and Experimental Research of a Dual Chamber Self-excited Oscillation Pulsed Jet Nozzle
摘要
Abstract
With dual chamber self-excited oscillation pulsed jet nozzle as the research object,changing the structure of the second stage chamber as the variables,the inner and outer flow fields of the jet nozzle were simulated by using FLUENT.These studies are based on the theories of transient flow and underwater acoustics,and combined with the standard κ-ε model.The structural chamber of the strongest hitting power is obtained,and hitting power was compared with self-excited oscillation pulsed jet nozzle.Research results show that the nozzle has the largest hitting power with optimal cavity length,cavity diameter and downstream collision wall shape of the nozzle,and hitting power of self-excited oscillation pulsed jet nozzle is more than the single chamber 13.2％.An experiment was built to make the erosion test,erosion law of rock was analyzed,and erosion volume and depth were computed.The results show that the best structure of the nozzle is in agreement with the numerical simulation;Compared with the single chamber Helmholtz self-excited oscillation pulsed jet nozzle,the erosion volume and depth increased by 14.5％ and 12.6％.关键词
自激振荡/喷嘴/双腔室/数值模拟/FLUENTKey words
self-excited oscillation/jet nozzle/dual chamber/numerical analysis/FLUENT/flow field分类
机械制造引用本文复制引用
邓嵘,李向东,丰波..双腔室自振脉冲喷嘴数值分析与实验研究[J].机械科学与技术,2017,36(12):1816-1822,7.基金项目
四川省科技支撑计划项目(2015GZX0159)资助 （2015GZX0159）
