供暖系统混水离心泵叶轮正反问题计算  

Computer Aided Design and Flow Analysis of the Mixture Water Centrifugal Pump Impeller in Heating System

作　　者：谭磊[1] 曹树良[1] 

机构地区：[1]清华大学,北京100084

出　　处：《流体机械》2009年第7期18-23,共6页Fluid Machinery

基　　金：国家自然科学基金资助项目(50776052);北京市科委2006年度科技计划重大资助项目(D0606005040411)

摘　　要：基于流线迭代法和逐点积分法,用Fortran语言编程实现了供暖系统混水离心泵叶轮的水力设计,讨论了轴面流道形状、叶轮包角和滑移系数对设计计算结果的影响。基于Navier-Stokes方程,在贴体坐标系中,采用交错网格技术和SIMPLEC算法,对依据不同设计参数设计出的两个叶轮内部流场进行了数值模拟,并将计算得到的流场压力分布和轴面速度分布进行了对比,同时对两个叶轮进行性能预估。研究表明:轴面流道形状和叶轮包角影响叶轮内部压力场和速度场的均匀性,导致两个叶轮的水力效率值存在约2%的差别。Based on streamline iteration method and point-by-point integration method, a computer code was developed in FORTRAN language to design the mixture water centrifugal pump in heating system in this paper. The analysis was used to analyze the effects of several parameters on the impeller shape, including the shape of the meridional passage, the impeller fold-angle and the slip factor. The pressure distributions and meridional velocity distributions of two impellers designed with different design variables were analyzed to predict their performance. The code used the SIMPLEC algorithm and body-fitted coordinate system to solve the Navier-Stokes equations. The results demonstrate that the shape of meridional passage and the impeller fold-angle affect the uniformity of pressure field and velocity field inside the impeller, which causes a difference of about 2% between the hydraulic efficiency of those two impellers.

关 键 词：离心泵 叶轮设计 数值模拟 水力效率 

分 类 号：TV675[水利工程—水利水电工程]