集液管及其内部导流板对旋喷泵性能的影响

Influence of the Collector and the Inner Guide Vane on Roto-Jet Pump Performance

摘要: 为研究集液管对旋喷泵性能的影响，本文对旋喷泵内部流场进行了数值模拟，获得了整泵流道内的速度、静压强和湍动能分布。本文对比了不同流量工况下的流动参数分布特征，重点讨论了集液管及内部导流板对流动的影响及集液管受到的流体作用力。结果表明：旋喷泵转子腔内的流动参数分布规律性强，在集液管入口处及集液管内流道转弯处存在着较高的静压强梯度；未设置导流板时集液管内流体湍动能较高，但泵性能较设置导流板时高；集液管所受的流体作用力合力随流量增加而下降，其中沿泵轴的作用力分量占主导地位，加装导流板后集液管的受力略下降。

Abstract: Numerical simulation was conducted to investigate the influence of the collector on the perfor-mance of a roto-jet pump. Distributions of velocity, static pressure as well as turbulent kinetic energy were obtained thereby. A comparison was implemented on flow parameter distributions at different flow rates. The emphasis was placed upon the effects of the collector and the inner guide vane on flows and the hydraulic forces exerted on the collector. Remarkable flow regularity is ob-served in the rotating chamber. High static pressure gradients occur at the inlet and the turning positions of the collector. Without the guide vane, overall turbulent kinetic energy is high but the pump performance is favorable relative to its counterparts with the guide vane. The resultant hy-draulic force acting upon the collector decreases with the increase of flow rate. The force component along the pump axis is predominant in this connection. A slight reduction of hydraulic force is manifested with the introduction of the guide vane.