摘要
为了研究双蜗壳式双吸离心泵内部的流动特性,采用雷诺时均方法和SSTk-ω湍流模型,对双蜗壳式双吸泵进行了不同工况下三维湍流数值模拟。将性能预测的结果与试验数据进行比较,证明了计算方法的可行性。重点分析了叶轮和双蜗壳内的速度和压力分布,计算结果表明双蜗壳可有效降低水泵运行作用在叶轮上的径向力,增强转子的运行稳定性。但是,在双蜗壳隔板外侧的流动区域内也发现了不同于普通蜗壳的回流区,使得压水室出口附近区域流动特性变差,这有待于今后通过水力设计优化对双蜗壳结构进行改进。
In order to investigate the internal flow characteristics of the double volute pump,we perform three-dimensional turbulence numerical simulations in the different conditions with Reynolds-averaged Navier-Stokes equations and shear stress transport turbulent（SST） models.Comparing the performance of the predicted results with the experimental data,it can be known that the calculation method is feasible.And then we mainly analyse the distribution of the velocity and pressure in the impeller and volute and it shows that double volute can effectively reduce the radial force and enhance the operation stability.But,it also finds that there are some differences in the flow region outside the blade double volute from recirculation zone of the ordinary volute,the water flowing property will be deteriorated near the discharge area And it needs to improve the structures of the double volute by the hydraulic design optimization in future.
出处
《流体机械》
CSCD
北大核心
2010年第10期29-32,57,共5页
Fluid Machinery
关键词
双吸离心泵
双蜗壳
流场
数值模拟
double-suction centrifugal pump
double volute
flow field
numerical simulation
