基于CFD的离心泵相似定律研究在农业中的应用

CFD-based Similarity Law of Centrifugal Pump Application in Agriculture

离心泵是应用十分广泛的流体输送设备,广泛用于农业中的输送水及灌溉之中,在农业生产中的地位更是毋庸置疑。由于流体在机内的运动情况十分复杂,利用已有泵的数据作为设计的依据,相似定律的合理应用问题应运而生。基于CFD方法,对离心泵内部流场进行了数值模拟,分析了离心泵内部流动现象和规律,同时对变工况情况也进行了数值模拟,分析得出相似定律的适用条件,并得出一些相似的理论公式,对农用离心泵的设计起到指导作用,对农业生产起到事半功倍的作用。

Centrifugal pump is the application of a very wide range of fluid transfer equipment,widely used as irrigation and water being transported in agriculture,the position in agricultural production is no doubt.Since the movement of fluid in the machine is very complex,and used of existing data as a pump design basis,the rational application of similarity laws had came into being.In this paper,simulated the flow field of centrifugal pump based CFD,the flow phenomena and laws of centrifugal pump were analyzed,meanwhile the variable condition was simulated situation,the applicable conditions of similarity law were obtained and concluded the theoretical formula of similarity law,played a guiding role for the design of agricultural pumps and a multiplier role on agricultural production.