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| 3D numerical simulation on unsteady turbulence flow in axial flow pump system |
| Feng Weimin, Song Li, Zuo Lei, Yuan Bo |
| (Key Laboratory of Hydro Mechanical Transients of Ministry of Education, Wuhan University, Wuhan, Hubei 430072, China) |
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Abstract In order to analyze inner flow transient performance of an axial flow pump, based on the unsteady incompressible flow governing equations and the RNG k-ε turbulence model, the SIMPLEC method and sliding mesh technique were used to numerically simulate the 3D turbulent flow of the full passage in a vertical axial flow pump within a complete rotating cycle. The interaction between pass flow parts was taken into consideration. The type of pump was 4000ZLQ53.5-6.6JS. The pressure, velocity and vortices distributions on the interaction surface were given under the conditions that blade angle was zero and the discharge was 53.5 m 3/s. The results show respectively the variation of flow field characteristics in the impeller, and full flow passage in one rotating cycle. Numerical simulation results were obtained through comparative analysis on the distribution on the interaction surface. By introducing dynamic performance prediction, doing time average and comparing the results of dynamic performance prediction with test data from a pumping station, the method proves to be credible. It is indicated that the 3D unsteady turbulent simulation is effective for understanding the axial flow pump flow field, as well as the interaction mechanism.
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Received: 09 November 2009
Published: 30 November 2010
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