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| Numerical simulation of internal flow of tubular pump system |
| Jin Yan, Liu Chao, Tang Fangping |
| (Hydrodynamic Engineering Laboratory of Jiangsu Province, Yangzhou University, Yangzhou, Jiangsu 225009, China) |
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Abstract Based on the Reynolds averaged Navier-Stokes equations and the RNG k-εturbulent model, the three dimensional flow field in a tubular pump system was simulated by CFD. The performance parameters of pump system such as head, shaft power and efficiency were predicted based on the calculation of different operating conditions with the flow rate range from 20 L／s to 35 L／s at the same rotating speed. At the best efficiency condition, the pressure is well distributed, and the flow pattern is steady, at small and large flow rate conditions the flow pattern in discharge passage becomes turbulent, flow deviation, separation and vortex are appeared. For verifying the accuracy and reliability of the calculation results, a model test was conducted. The comparison of simulation results and the experiment data show that the calculation performances close agree with the experiment results in the high efficiency area, but under the condition of large discharge and low rate, deviations exist between the two results.
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Received: 17 November 2009
Published: 30 September 2009
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