王晓晖,夏正廷,敏政,郝艳,匡开林
Wang Xiaohui,Xia Zhengting,Min Zheng,Hao Yan,Kuang Kailin

• 1:兰州理工大学能动学院
• 2:甘肃省流体机械及系统重点实验室

摘要(Abstract)：

离心泵反转作透平(PAT)可回收液体能量。泵工况和透平工况流量、扬程换算关系H_t/H_p、Q_t/Q_p是PAT选型设计与性能预测的关键,而现有的换算关系对低比转速PAT误差较大。通过分析放大系数及速度滑移对低比转速PAT性能换算关系的影响,得到一种性能换算的修正方法。对比转速为33～86的8台PAT采用数值模拟软件FLUENT 17.0进行数值计算,分别得出其扬程、流量换算关系的修正系数。该修正系数与比转速的关系通过多项式拟合得到。采用已公开的7台低比转速PAT试验结果验证,与其他方法相比采用该修正系数计算的H_t/H_p、Q_t/Q_p误差约减小3%～15%。针对低比转速PAT的选型设计和性能预测该方法可提供理论指导。
The centrifugal pump as turbine (PAT) can recover liquid energy. The flow rate and head conversion relationships(H_t/H_p,Q_t/Q_p) between pump mode and turbine mode are the key to selection design and performance prediction of PAT,while the existing conversion relationship has a large error for the low specific speed PAT. In this paper,By analyzing the influence of enlargement coefficient and velocity slip on the performance conversion relationship of low specific speed PAT,and a corrective method for performance conversion is obtained. 8 PATs with a specific speed of 33-86 were numerically calculated by using The computational fluid dynamics software FLUENT 17.0,then the correction coefficients of their head and flow conversion relationships were obtained respectively. The relation between the correction coefficient and specific speed is obtained by polynomial fitting. The results of seven low specific speed PAT tests have been used to verify the corrective method,Compared with other methods,the errors of H_t/H_p and Q_t/Q_p calculated by this correction coefficient are reduced about 3%～15%. This method can provides theoretical guidance for the selection design and performance prediction of low specific speed PAT.

关键词(KeyWords)： 离心泵;泵反转液力透平;低比转速;换算关系;修正系数
centrifugal pump;pump as turbine;low specific speed;conversion relationship;correction coefficient

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51569013)

作者(Author): 王晓晖,夏正廷,敏政,郝艳,匡开林
Wang Xiaohui,Xia Zhengting,Min Zheng,Hao Yan,Kuang Kailin

参考文献(References)：

• [1]王晓晖,杨军虎,史凤霞.能量回收液力透平的研究现状及展望[J].排灌机械工程学报,2014,32(9):742-747.
• [2]杨孙圣,孔繁余,宿向辉,等.泵及泵用作透平时的数值模拟与外特性实验[J].西安交通大学学报,2012,46(3):37-41.
• [3]杨军虎,王晓晖.叶片形状对能量回收水力透平性能的影响[J].排灌机械工程学报,2011,29(4):287-291.
• [4]Derakhshan S,Nourbakhsh A.Experimental study of characteristic curves of centrifugal pumps working as turbines in different specific speeds[J].Experimental Thermal and Fluid Science,2008,32(3):800-807.
• [5]Nautiyal H,Varun V,Kumar A,et al.Experimental investigation of centrifugal pump working as turbine for small hydropower Systems[J].Energy Science and Technology,2011,1(1):79-86.
• [6]Barbarelli S,Amelio M,Florio G.Experimental activity at test rig validating correlateions to select pumps running as turbines in microhydro plants[J].Energy Conversion&Management,2017(149):781-797.
• [7]Barbarelli S,Amelio M,Florio G,et al.Procedure selecting pumps running as turbines in micro hydro plants[J].Energy Procedia,2017(126):549-556.
• [8]Stefanizzi M,Torresi M,Fortunato B,et al.Experimental investigation and performance prediction modeling of a single stage centrifugal pump operating as turbine[J].Energy Procedia.2017(126):589-596.
• [9]Pugliese F,Paola F D,Fontana N,et al.Experimental characterization of two pumps as turbines for hydropower generation[J].Renewable Energy,2016(99):180-187.
• [10]Huang S,Qiu G,Su X,et al.Performance prediction of a centrifugal pump as turbine using rotor-volute matching principle[J].Fluid Machinery,2017(108):64-71.
• [11]王晓晖,杨军虎,夏正廷,等.泵反转液力透平速度滑移的计算与分析[J].华中技大学学报(自然科学版),2017,45(9):64-68.
• [12]史广泰,杨军虎．离心泵用作液力透平叶轮出口滑移系数的计算方法[J]．农业工程学报,2014,30(13):68-77.
• [13]Wang X H,Yang J H,Shi F X,et al.Theoretical and numerical study of performance prediction of centrifugal pumps as turbines[J].Applied Mechanics&Materials,2013(444-445):579-587.
• [14]倪永燕,袁寿其,袁建平,等.低比转速离心泵加大流量设计法研究[J].中国农村水利水电,2007(8):126-129.
• [15]杨军虎,张人会.一种计算低比转速离心泵加大系数的方法[J].机械工程学报,2005,41(4):203-205.
• [16]朱祖超,麻明祥.小流量高扬程高速离心泵的加大流量设计[J].浙江大学学报(工学版),2001,35(1):11-15.
• [17]袁寿其.低比速离心泵理论与设计[M].北京：机械工业出版社,1997.
• [18]杨军虎,雷蕾,张书玮,等.介质黏度对泵作透平时性能换算的影响[J].排灌机械工程学报,2017,35(7):553-557.
• [19]董亮,刘厚林.叶片泵CFD数值计算实例详解[M].北京：机械工业出版社,2015.