流体机械

2009, v.37;No.444(06) 10-13

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船用冷却泵数值模拟与试验对比分析
Comparison of Experimental Performance Curves of Ship Cooling Pump and CFD Results

王董梅;刘建瑞;徐永刚;苏起钦;
WANG Dong-mei,LIU Jian-rui,XU Yong-gang,SU Qi-qin(Jiangsu University,Zhenjiang 212013,China)

摘要(Abstract):

对CB80-65-125型船用冷却泵建立三维物理模型,采用FLUENT提供的标准k-ε模型,SIMPLEC算法,模拟分析了泵14个工况点的内部流场,预测出性能变化情况,与试验结果相比较,得出各个性能参数的误差值;分析了设计工况下叶片背面,工作面和z=0平面静压和相对速度分布情况。分析结果发现,CFD技术能够预测出扬程和效率的变化情况,流量在0.38Q~Q时结果比较准确,最佳工况点在1.2Q,与试验结果误差较小。在0~0.38Q及Q~1.35Q时模拟结果的误差比较大,但0~Q内误差值在8%以内。静压和相对速度分布情况与理论相符。CFD技术在泵设计阶段初步预测其性能的优劣,为泵的设计提供理论依据。
Based on the CB80-65-125 cooling ship pump,the three-dimensional model drawing was drawn.And then the 14-point-operation simulation was performed for the pump inner flow by using Fluent software with SIMPLEC algorithm and standard k-ε turbulence model.The calculation results were compared with the experimental data.And the deviation can be obtained.Besides,by studying the distribution of static pressure and the relative velocity on the pressure surface,the suction surface,and z=0plane when it was the design point,it can concluded that: CFD is able to forecast pump's efficiency and head at 0.38~1 times design operating point,and also the best operating position accurately.The calculated best operating position is at 1.2 times design operating point,which deviating the experimental point not too far.The accuracy of 0~0.38Q and Q~1.35Q is not ideal.However,the deviation from experimental data is within 8% between 0 and Q.The distribution of static pressure and the relative velocity match the theory very well.In conclusions,it is feasible to forecast the performance of the pump by CFD combined the tests when designing the pump.

关键词(KeyWords): 船用泵;冷却泵;试验;模拟;性能比较
ship pump;cooling pump;experiment;numerical simulation;performance comparison

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基金项目(Foundation): 江苏省科技支撑计划项目(BE2008381)

作者(Author): 王董梅;刘建瑞;徐永刚;苏起钦;
WANG Dong-mei,LIU Jian-rui,XU Yong-gang,SU Qi-qin(Jiangsu University,Zhenjiang 212013,China)

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