叶片型线影响射流离心泵水力及旋转噪声特性分析  

Influence of blade profile on the hydraulic and rotating noise characteristics of a jet centrifugal pump

作　　者：郭荣 李仁年[1,2] 张人会 李晶[1] 申正精 GUO Rong;LI Rennian;ZHANG Renhui;LI Jing;SHEN Zhengjing(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Fluid Machinery and Systems,Gansu Province,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]甘肃省流体机械及系统重点试验室,兰州730050

出　　处：《振动与冲击》2019年第18期223-230,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51579125);国家重点研发计划(2016YFB0200901);甘肃省青年科技基金(1606RJYA297)

摘　　要：为研究叶片型线对射流离心泵水力性能及旋转噪声特性的影响,提升射流离心泵叶轮设计水平,应用高阶Bezier曲线对叶片型线进行参数化控制,采用Plackett-Burman方法进行参数的显著性分析和筛选,基于响应面法对敏感性较强的3个控制变量进行中心复合试验设计,建立射流离心泵叶片型线与效率、扬程、轴功率及旋转噪声之间的多元回归模型,确定水力性能和声学性能之间的映射关系。结果表明:叶片包角、叶片出口安放角、叶片进口直径对射流离心泵的水力性能和声学性能影响最为显著;方差分析法和系数法检验结果证明回归模型高度显著,能够反映叶型控制参数与响应目标之间的客观关系;较小的包角、较大的出口安放角、较小的进口直径有助于改善射流离心泵的水力性能,设计空间水力性能最优参数组合为包角φ=52.5°,出口安放角β2=50°,叶片进口直径Dj=14.5;叶型各控制参数编码靠近0水平时有助于改善声学性能,设计空间声学性能最优参数组合为包角φ=76°,出口安放角β2=33°,叶片进口直径Dj=18;声学性能和水力性能在叶片型线的样本空间内具有逼近Pareto解的能力,Pareto前沿解沿一条呈下的凸形曲线分布。To study the effect of blade profile on the hydraulic and rotational noise characteristics of a jet centrifugal pump(JCP)and improve the design level of JCP impeller,the high order Bezier curve was applied to the parametric control of the blade profile.The sensitivity analysis and screening of parameters were accomplished using the Plackett-Burman method.The central composite experiment design of 3 the most sensitive control variables was accomplished based on the response surface method.A multiple regression model between the blade profile and the efficiency,head,shaft power and rotational noise was established,and the mapping relationship between hydraulic and acoustic properties was confirmed.It is shown that the blade wrap angle,outlet angle,and inlet diameter have the most significant influences on hydraulic and acoustic performances.Smaller wrap angle,larger outlet angle and smaller inlet diameter are helpful to improve the hydraulic performances,and in the design space,the optimal parameter combination is wrap angleφ=52.5°,outlet angleβ2=50°,inlet diameter Dj=14.5.It is helpful to improve the acoustic performances when the coding level of each control parameter is close to 0,and the optimal combination of parameters is wrap angleφ=76°,outlet angleβ2=33°,inlet diameter Dj=18.The acoustic and hydraulic properties have the ability to approximate the Pareto solution in the sample space of the blade profile,and the Pareto front solution distributes along a downward convex curve.

关 键 词：叶片型线 水力性能 旋转噪声 响应面 射流离心泵 

分 类 号：TH311[机械工程—机械制造及自动化]