%A ZHANG Pei-fang, YUAN Shou-qi, YU Jian-qiang %T Present Status and Development Trends of Low-specific-speed Centrifugal Pumps %0 Journal Article %D 2003 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2003.06.015 %P 42-45 %V 21 %N 6 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_1046.shtml} %8 2003-11-25 %X The hydraulic design theory and configuration status of low-specific-speed centrifugal pumps are summarized. The main problems of pumps in hydraulic characteristics such as low pump efficiency, humble head-flow curve and easily overload brake horsepower etc, and their countermeasures developed in recent years including greater flow design and non-overload theory etc, are introduced thoroughly. Some problems under settlement in the development of low-specific-speed centrifugal pumps are discussed and the trends for further development are also put forward.