潜水式贯流泵导叶特性非定常流场的数值模拟

采用RNGk-ε湍流模型和滑移网格技术,对无导叶、直导叶、弯导叶潜水式3种不同方案下的贯流泵进行非定常数值模拟,得到了不同工况下监测点的压力脉动情况。研究表明:3种方案下潜水式贯流泵的有效扬程相差不大,弯导叶式贯流泵的效率较高,且具有较好的出口速度流线分布规律;3种不同方案均在叶片进口处压力脉动幅值最大,导叶整流作用减小了由叶轮旋转产生的压力脉动,且导叶形状不同相应的压力脉动也不同,弯导叶的整流效果较好。

A Numerical Simulation of the Characteristics of Guide Vanes in Submersible Turbine Pumps

RNG k-ε turbulent model and sliding mesh technology are applied to three types of submersible turbine pumps(non-guide vanes,straight-guide vanes and bending-guide vanes) for unsteady numerical simulation.Pressure pulsation details at monitored points are obtained.The results show that the three types of submersible turbine pumps have a similar effective head;the submersible turbine pump with the bending guide vanes shows a higher efficiency and has good export streamline distributions.The three models all have the largest pressure pulse amplitude at the blade import.The guide vane rectifier reduces the pressure fluctuation caused by the rotating impeller and guide vanes of different shapes show different pressure fluctuations.The bending guide vane has a better rectifying effect.