轴流泵内部流场压力脉动性能预测与试验  

Performance Prediction and Experiment for Pressure Fluctuation of Interior Flow in Axial-flow Pump

作　　者：施卫东[1] 冷洪飞[1] 张德胜[1] 龙飞[1] 张华[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,镇江212013

出　　处：《农业机械学报》2011年第5期44-48,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(51079063);江苏高等学校优秀科技创新团队计划资助项目(苏教科[2009]10号);国家科技人员服务企业行动资助项目(2009GJC30002)

摘　　要：基于雷诺时均控制方程和标准k-ε湍流模型,应用SIMPLEC算法,对轴流泵全流场进行三维非定常数值模拟,得到轴流泵在不同工况和不同导叶数内部流场的压力脉动特性。数值分析与试验结果表明:轴流泵内最大压力脉动发生在叶轮进口处;在偏离设计工况点较大的流量时,压力脉动幅值明显增大;导叶数减少会增大导叶出口处的压力脉动;脉动频率受叶轮转动频率控制,导叶数对压力脉动频率基本无影响。The three dimensional unsteady turbulent flow in axial-flow pump whole flow field was simulated based on Reynolds time-averaged Navier-Stoke（RANS） solver embedded with k-ε turbulence model and SIMPLEC arithmetic.The pressure fluctuation under various operation conditions and different guide-vanes were obtained.Numerical and experimental results showed that the maximum amplitude of pressure fluctuation took place at the inlet of impeller.The amplitude of pressure fluctuation became stronger significantly as the flow rate was far from optimum operation point.At the outlet of guide-vanes the fluctuation amplitude increased when the number of guide-vanes reduced.The frequency of pressure fluctuation is dominated by the rotation speed of impeller and the number of guide-vanes has little affect on it.

关 键 词：轴流泵 压力脉动 压力系数 性能预测 试验 

分 类 号：TH312[机械工程—机械制造及自动化] O351.2[理学—流体力学]