论文部分内容阅读
水泵内部流动实质上是复杂的三维非稳定流动 ,它对水泵性能及结构振动有重要影响。本文介绍了一种求解这种复杂内流动的数值方法。三维雷诺数平均的纳维斯托克斯方程 ( 3-DReynolds-averaged Navier-Stokes,RANS)以及标准 k-ε的方程用于描述水泵内非定常紊流流场。系统特性方程与水泵的 CFD模型相结合以考虑流体在管道中的加速 ;采用任意滑移网格界面模拟叶轮和静止部件之间的相互干涉 ;将整个叶轮作为分析对象 ,以考虑失速情况下流动的周向非对称。这些技术的结合包括了水泵内非稳定流动的物理实质。一台实验数据比较齐全的离心式 -扩压器水泵被用于验证所提出的数值方法
Pump internal flow is essentially a complex three-dimensional unsteady flow, which has a significant impact on pump performance and structural vibration. This article presents a numerical method for solving this complex flow problem. The 3-Reynolds-averaged Navier-Stokes (RANS) and the standard k-ε equations are used to describe the unsteady turbulent flow field in a pump. The system characteristic equation is combined with the pump’s CFD model to account for fluid acceleration in the pipeline; any sliding mesh interface is used to simulate the interaction between the impeller and stationary components; the entire impeller is analyzed to account for the flow in the stall condition The circumferential asymmetry. The combination of these technologies includes the physical essence of unsteady flow in the pump. A more complete experimental data centrifugal - diffuser pump was used to verify the proposed numerical method