低比速离心泵水力设计进展

介绍了低比速离心泵在水力性质方面的主要问题，即效率低，易产生驼峰和易过载，讨论了现代水力设计的基本要求，对近年来逐步发展起来的低比速尿水力设计方法如加大流量法、无过载原理、复合叶轮、面积比理论及各种优化设计方法进行了简要评述，对各种设计方法比较并讨论了其同的相互关系。从目前的研究进展看，针对用户特定的性能需要，只要选择合适的方法并结合设计师自身的经验，是可以设计出理想低比速泵的。该文还对低比速泵的

ADVANCES IN HYDRAULIC DESIGN OF LOW SPECIFIC SPEED CENTRIFUGAL PUMPS

The main hydraulic problem for low specific speed centrifugal pumps namely lower efficiency, drooping head-flow curve and easily overloading brake horsepower are introduced and the fundamental requirements for modern hydraulic design are discussed. The recently developed hydraulic design methods for low specific speed centrifugal pumps including the greater flow design, non-overload theory, splitter-blade method, area ratio principle and optimum design are reviewed. The advantageous and disadvantageous for these methods are discussed and compared. It can be concluded that as long as selecting the proper design method and with his own experience, the designer can develop the satisfactory low specific speed centrifugal to meet the user's specific hydraulic requirements. The trends for further development are also prospected here.