Computational fluid dynamics were used to study the three-dimensional unsteady incompressible viscous flows in a centrifugal pump during rapid starting period (≈0.12 s). The rotational speed variation of the field around the impeller was realized by a dynamic slip region method, which combines the dynamic mesh method with nonconformal grid boundaries. In order to avoid introducing errors brought by the externally specified unsteady inlet and outlet boundary conditions, a physical model composed of a pipe system and pump was developed for numerical self-coupling computation. The proposed method makes the computation processes more close to the real conditions. Relations between the instantaneous flow evolutions and the corresponding transient flow-rate, head, efficiency and power were analyzed. Relative velocity comparisons between the transient and the corresponding quasisteady results were discussed. Observations of the formations and evolutions of the primary vortices filled between the startup blades illustrate the features of the transient internal flow. The computational transient performances qualitatively agree with published data, indicating that the present method is capable of solving unsteady flow in a centrifugal pump under transient operations.
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e-mail: andycas@zju.edu.cn
e-mail: wudazhuan@zju.edu.cn
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August 2010
Research Papers
Numerical Simulation of the Transient Flow in a Centrifugal Pump During Starting Period
Zhifeng Li,
Zhifeng Li
Institute of Process Equipment, Department of Chemical and Biological Engineering,
e-mail: andycas@zju.edu.cn
Zhejiang University
, Hangzhou 310027, P. R. China
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Dazhuan Wu,
Dazhuan Wu
Institute of Process Equipment, Department of Chemical and Biological Engineering,
e-mail: wudazhuan@zju.edu.cn
Zhejiang University
, Hangzhou 310027, P. R. China
Search for other works by this author on:
Leqin Wang,
Leqin Wang
Institute of Process Equipment, Department of Chemical and Biological Engineering,
e-mail: hj_wlq2@zju.edu.cn
Zhejiang University
, Hangzhou 310027, P. R. China
Search for other works by this author on:
Bin Huang
Bin Huang
Institute of Process Equipment, Department of Chemical and Biological Engineering,
e-mail: huangbin4862@sina.com
Zhejiang University
, Hangzhou 310027, P. R. China
Search for other works by this author on:
Zhifeng Li
Institute of Process Equipment, Department of Chemical and Biological Engineering,
Zhejiang University
, Hangzhou 310027, P. R. Chinae-mail: andycas@zju.edu.cn
Dazhuan Wu
Institute of Process Equipment, Department of Chemical and Biological Engineering,
Zhejiang University
, Hangzhou 310027, P. R. Chinae-mail: wudazhuan@zju.edu.cn
Leqin Wang
Institute of Process Equipment, Department of Chemical and Biological Engineering,
Zhejiang University
, Hangzhou 310027, P. R. Chinae-mail: hj_wlq2@zju.edu.cn
Bin Huang
Institute of Process Equipment, Department of Chemical and Biological Engineering,
Zhejiang University
, Hangzhou 310027, P. R. Chinae-mail: huangbin4862@sina.com
J. Fluids Eng. Aug 2010, 132(8): 081102 (8 pages)
Published Online: August 16, 2010
Article history
Received:
November 29, 2009
Revised:
June 20, 2010
Online:
August 16, 2010
Published:
August 16, 2010
Citation
Li, Z., Wu, D., Wang, L., and Huang, B. (August 16, 2010). "Numerical Simulation of the Transient Flow in a Centrifugal Pump During Starting Period." ASME. J. Fluids Eng. August 2010; 132(8): 081102. https://doi.org/10.1115/1.4002056
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