便携泵的水力性能和空化性能分析

Analysis of Hydraulic and Cavitation Performances of Portable Pump

针对便携泵这一特定叶片泵,介绍利用ANSYS CFX对其水力性能、空化性能的分析方法。给定不同流量,分别计算分析泵的扬程、轴功率、效率三者各自与流量的关系,并分析该泵在额定流量下的流场特性;给定不同入口压力,计算该泵的扬程与汽蚀余量(NPSH)的关系曲线,并根据曲线找到泵的临界汽蚀余量。该方法可广泛用于离心泵的性能计算分析,为工程师提供设计验证。

Using a CFD tool named ANSYS CFX,the hydraulic and cavitation performances of a portable pump are analyzed.The relationships of hydraulic head,power and efficiency with rate of flow are calculated.The flow field characteristic corresponding to rated flow is given.With different inlet pressure,the relation curve of hydraulic head and NPSH is obtained,while the value of critical NPSH is calculated.The above method is available to centrifugal pump’s performance analysis,to help engineers’design verification.