螺旋离心泵的汽蚀性能分析

Performance Analysis of Cavitation in a Screw Centrifugal Pump

以150×100LN-32型螺旋离心泵为研究对象,对其汽蚀过程和汽蚀条件进行了分析。使用经验计算公式对其汽蚀余量进行了计算,并通过试验验证了计算值。采用Fluent软件,选用标准k-ε模型和汽蚀模型,对螺旋离心泵的汽蚀过程进行了模拟,找出了其最容易发生汽蚀的部位。从泵汽蚀基本方程出发,通过对螺旋离心泵的结构进行分析,指出其汽蚀部位最容易发生汽蚀的原因、具有多级加能的作用和其具有优良的抗蚀性能。

The cavitational process and cavitational condition are analyzed on the basis of the object, 150×100LN-32 screw centrifugal pump. Cavitational value calculated by using experiential expressions is validated via hydraulic test. The easiest cavitational part is found out by choosing standardk-ε model, cavitational model and using Fluent software, on the basis of simulating cavitational process of screw centrifugal pump. The reason of cavitation in the easiest cavitational part, function of multilevel adding energy and the low required cavitational value, fine cavitation-resistant performance, are indicated by the analysis of special structure of screw centrifugal pump from the cavitational equation of pump.