%A ZHANG Rentian,, ZHU Honggeng, BU Ge, SHAN Haichun, ZHOU Wei, YAO LinbiŠĪ %T Performance analysis of bulb tubular pumps in first phase of South-to-North Water Diversion Eastern Route Project in China %0 Journal Article %D 2017 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.15.0217 %P 32-41 %V 35 %N 1 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_2173.shtml} %8 2017-01-25 %X Bulb tubular pumps have been installed in six pumping stations in the first phase of the South-to-North Water Diversion Eastern Route Project in China. For the difference in their structure, there exist differences in their performances. In this paper, experimental results of the model pumping systems are analyzed firstly, the methodologies and measures for optimal hydraulic design are introduced. According to the results in acceptance model tests conducted, the pump performances are superior to the guaranteed ones in the contracts. By using dimensionless head, flow rate coefficients and suction specific speed, a comparison of hydraulic performance among six pumping systems in the same pump model is carried out. The results show that the dimensionless head-flow rate curves are basically identical for six pumps, and their best efficiency is all as high as above 80%, demonstrating an excellent performance even these bulb tubular pumps are subject to different structures. In the light of the measured performance data on site, it is confirmed further that these bulb tubular pumps do have excellent performance and better operational stability, and the performance data are better than the predictions by making use of model test. The bulb tubular pump is suitable for low head pumping stations in the South-to-North Water Diversion Project in China.ŠĪ