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| Influence of interstage seal clearance on performance of newtype well pump |
| SHI Wei-Dong, WANG Chuan, SI Qiao-Rui, XU Jing, LU Wei-Gang |
(1. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China;
2. School of Management, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract In order to explore influence of interstage seal clearance on the performance and flow field of multistage well pumps, a newtype well pump QS-40-30-55 was taken as the investigation model; the whole flow field in the pump with different seal clearances were stimulated with Fluent. Effects of the clearance on the overall performance and internal fluid flow field in the pump were analyzed. The results showed that the head and efficiency of the pumps are reduced, while the shaftpower remains unchanged with increasing clearance at the same flow rate. A stream of liquid in the guide vane exit flows back into the impeller hub along the interstage seal clearance and then it moves into the guide vane through the side chamber between the impeller and the guide vane, causing a disturbance in the flow at the guide vane exit and the entrance to the next stage impeller, which increases the hydraulic losses and degrade the pump performance. The experimental results of the prototype of the pump show the best efficiency point occurs at a lower flow rate than the specified one, but it is still in accord with the National Pump Test Standard of China. Because the impeller disc friction loss and the leakage loss through the interstage seal clearance have been involved in the computational model, the estimated performance by CFD is in very good agreement with experiments (error is less than 1％), confirming the validity of CFD numerical simulation approach. Those results might be instructive for optimal design of newtype well pumps, especially whose impellers are designed by means of the impeller diameter maximization method.
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Received: 12 April 2012
Published: 30 November 2012
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| ［1］关醒凡. 现代泵理论与设计［M］. 北京:中国宇航出版社,2011: 615-619.［2］Zhang Desheng, Shi Weidong, Chen Bin, et al. Unsteady flow analysis and experimental investigation of axialflow pump［J］. Journal of Hydrodynamics: Ser B, 2010, 22(1): 35-44.［3］Shi Weidong, Zhang Desheng, Guan Xingfan, et al. Numerical and experimental investigation on highefficiency axialflow pump［J］. Chinese Journal of Mechanical Engineering, 2010, 23(1):38-44.［4］王川,施卫东,陆伟刚,等. 不同叶片厚度的不锈钢冲压井泵性能模拟与试验［J］. 农业机械学报,2012, 43(7): 94-99.Wang Chuan, Shi Weidong, Lu Weigang, et al. Effect and experiment of different blade thickness on stainless steel stamping well pump performance［J］. Transactions of the Chinese Society for Agricultural Machinery, 2012, 43(7): 94-99. (in Chinese)［5］王川,陆伟刚,施卫东,等. 不锈钢冲压潜水井泵的数值计算与试验验证［J］. 江苏大学学报:自然科学版,2012, 33(2): 176-180.Wang Chuan, Lu Weigang, Shi Weidong, et al. Numerical calculation and experimental verification of stainless steel stamping submersible well pump［J］. Journal of Jiangsu University:Natural Science Edition, 2012, 33(2): 176-180. (in Chinese)［6］Wang Chuan, Shi Weidong, Lu Weigang, et al. Regression test of stain steel stainless wellpump based on numerical simulation ［J］. Advanced Materials Research, 2012, 354:847-852.［7］Shi Weidong, Wang Chuan, Si Qiaorui, et al. Numerical calculation of stainless steel stamping well pump based on regression orthogonal test［J］. International Journal of Comprehensive Engineering: Part C, 2012, 1(1): 39-49.［8］黄思, 桑迪科, 彭少华, 等. 基于CFD的冲压式多级离心泵性能预测［J］. 水泵技术, 2009(2): 11-13.Huang Si, Sang Dike, Peng Shaohua, et al. Performance prediction stamping multilevel centrifugal pumps based on CFD［J］. Pump Technology, 2009(2): 11-13. (in Chinese)［9］刘元义, 王广业. 冲压焊接多级离心泵叶轮内部流场的计算机辅助分析［J］. 机械工程学报, 2007, 43(8): 207-211.Liu Yuanyi, Wang Guangye. Computeraided analysis on inner flow in stamping and welding multistage centrifugal pump's impellers［J］. Chinese Journal of Mechanical Engineering, 2007, 43(8): 207-211. (in Chinese) |
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