设计船用循环泵的一个重要任务就是要从流体动力学性能、强度性能和汽蚀——噪音性能最适当搭配的观点出发来绘制它的过流部件。由于这此性能指标主要是由叶轮的结构参数和运动参数决定的,而且彼此间互有关联,因此就必须要获得它们的最适当的搭配关系。在设计船用轴流循环泵的某个阶段,要确定液体绕叶轮叶片流动的环量的分布规律,即 An important task in designing a marine circulating pump is to map its overcurrent components from the point of view of the most appropriate combination of hydrodynamic performance, strength properties, and cavitation-noise performance. Because this performance index is mainly determined by the structural parameters and the movement parameters of the impeller, and are related to each other, it is necessary to obtain the most appropriate relationship between them. In the design of a ship axial circulation pump at a certain stage, to determine the flow of liquid around the impeller blade circulation distribution, that is