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为了更深入的研究孔板形式对高速离心泵进口段回流漩涡的影响,提出改变孔板前后倾角大小的方法,主要设计了25种不同倾角孔板的组合方案,利用电脑模拟软件ANSYS-CFX对某一高速离心泵进行全流场的数值模拟分析,从中选取了对高速离心泵水力性能提高较大的3种倾角方案,对比分析高速离心泵的整体的流线和进口段的速度矢量变化情况,诱导轮叶轮压力和内部流场的影响,并对不同倾角孔板的性能曲线进行分析。综合对比分析为:-20°/10°型孔板能较好的改善进口段的回流漩涡,抑制诱导轮内部的回旋流,对高速离心泵的水力性能有很大提高。
In order to further study the influence of the orifice pattern on the backflow vortex in the inlet section of a high-speed centrifugal pump, a method of changing the inclination angle of the orifice plate is proposed. The combination scheme of 25 different inclination orifice plates is designed. By computer simulation software ANSYS-CFX A high-speed centrifugal pump for the whole flow field numerical simulation analysis, selected from the high-speed centrifugal pump to improve the hydraulic performance of the three kinds of inclination of the program, comparative analysis of the high-speed centrifugal pump overall flow line and the inlet section of the speed vector changes , Induced wheel impeller pressure and internal flow field, and analyzed the performance curves of different angle plate. The comprehensive comparative analysis shows that: -20 ° / 10 ° orifice plate can better improve the backflow vortex at the inlet section, restrain the swirling flow inside the induction wheel, and greatly improve the hydraulic performance of the high speed centrifugal pump.