结构参数对自激脉冲射流特性影响的统计分析  

Statistical analysis of effects of structural parameters on characteristics of underwater self-excited pulse jet

作　　者：高传昌 胡一伟 李欢 马文良 GAO Chuanchang;HU Yiwei;LI Huan;MA Wenliang(School of Electric Power,North China University of Water Conservancy and Hydropower,Zhengzhou,Henan 450011,China;Jilin Dunhua Pumped Storage Limited Company,Dunhua,Jilin 133700,China)

机构地区：[1]华北水利水电大学电力学院,河南郑州450000 [2]吉林敦化抽水蓄能有限公司,吉林敦化133700

出　　处：《排灌机械工程学报》2018年第4期327-333,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51309099)

摘　　要：为了得到水下自激吸气脉冲射流冲击特性较优的喷嘴结构参数配比,以自行研制的自激吸气脉冲射流喷嘴为研究对象,运用数理统计的方法就水下自激吸气脉冲射流冲击脉动压力试验数据的均方差、脉动压力峰值和时均压力随上下喷嘴面积比、腔长下喷嘴比和腔径腔长比的变化进行分析,并检验了水下自激吸气脉冲射流冲击脉动压力试验数据的平稳性和正态分布.由试验结果可知,当围压小于0.4 MPa时,上下喷嘴面积比范围为1.96~4.84,最优范围1.96~4.00;当围压≤0.2 MPa时,腔长下喷嘴比范围2.8~4.4,最优值3.4,腔径腔长比范围为1.50~1.65或2.20~2.30,最优范围应为1.50~1.65.In order to obtain the optimal ratio of the nozzle structure parameters of the underwater self-excited suction pulsed jet,taking the self-developed self-excited suction jet nozzle as study object,based on the theory of the mathematical statistics,the mean square error,pulsating pressure peak and time-averaged pressure from the pulsating pressure test data of underwater self-excited suction pulsed jet with the change of nozzle area ratio,cavity ratio and cavity length ratio were analyzed.The optimal ratio of the nozzle structure parameters of the underwater self-excited suction pulsed jet was obtained.When the confining pressure is less than 0.4 MPa,the upper and lower nozzle area ratio range is 1.96-4.84,and the optimal range is 1.96-4.00.When the confining pressure is less than or equal to 0.2 MPa,the cavity length is 2.8-4.4,the optimal value is 3.4,the cavity length ratio is 1.50-1.65 or 2.20-2.30,and the optimal range should be 1.50-1.65.

关 键 词：脉冲射流喷嘴 结构参数 水下 冲击特性 自激吸气 统计特征量 

分 类 号：S277.9[农业科学—农业水土工程] TP69[农业科学—农业工程]