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Internal flow analysis of centrifugal pumps influenced by flow, motor and electricity |
SUN Hui, YUAN Shouqi, LUO Yin, GUO Yihang |
National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract In order to improve the accuracy of unsteady load torque computational results for centrifugal pumps, the type IS65-50-160-00 centrifugal pump and Y160M-2 B3 three-phase asynchronous motor were selected as computational model. Joint simulation of the centrifugal pump and motor was conducted by means of software Fluent and Matlab. The C++ interface program for software communication was designed on basis of TCP/IP communication protocol. A bidirectional synchronization coupling simulation platform was established. This could realize data transmission of rotational speed and torque during the process of computing unsteady characteristics of centrifugal pumps. It was shown that if the rotating speed was set as constant, the calculated pump head and efficiency were deviated from experimental data by 8.66% and 5.24% under the design condition. But if the rotating speed was set as variable, the calculated pump head and efficiency were deviated from experimental data by 2.45% and 2.47% under the design condition. This means the method could provide more correct and reliable prediction performance of pump. This joint simulation method based on Fluent/Matlab has brought into the effect of motor on pump operation and considered the fact of variable rotating speed. The method has improved the accuracy and reliability of calculating results, which could provide a new method for further research on internal unsteady flow characteristics of centrifugal pumps.
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Received: 16 December 2015
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