Therefore, three-dimensional steady numerical simulation and experimental methods are used to study the internal flow field and external characteristic performance curve of centrifugal pump at different flows and speeds. 因此本文采用数值模拟及试验相结合的方法,在不同流量和转速下对其内部流场进行了三维定常数值计算研究,并在不同转速下进行了试验研究。