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| Multi-operating-condition hydraulic design of centrifugal charging pump for nuclear power plant |
| Yuan Shouqi1, Fu Qiang1, Zhu Rongsheng1,2 |
| (1.Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Jiangsu Guoquan Manufacturing Pump Co.Ltd., Zhenjiang, Jiangsu 212009, China) |
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Abstract The centrifugal charging pump is multistage and double casing structure. The hydraulic performance of the pump needs to satisfy five operating conditions according to the demands of nuclear power plant. A technique that combinated various impeller hydraulic optimization design and impeller multi-condition design was put forward. A centrifugal charging pump was designed at multi-condition. The combination rules of multi-stage centrifugal pumps were applied to split the multi-condition points of the charging pump. An optimized design scheme from different impellers performance curves was obtained. The 1st stage impeller, 2nd-4th stage impellers and 5th-12th stage impellers were designed. A four-stage pump prototype(n=2 950 r/min) was manufactured according to the design scheme and its performance test was carried out. The test results scaled to normal speed of 4 500 r/min show that the heads of four operating conditions are 2.6% larger than that of requirements, and just the head at maximum flow rate is 11.8% lower than that of requirments. The multi-condition hydraulic design is realized.
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Received: 20 January 2010
Published: 30 May 2010
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