CFD analysis of cavitation phenomena in mixed-flow pump

被引：14
作者：
Sedlar, Milan [1 ]
Sputa, Oldrich [2 ]
Komarek, Martin [2 ]
机构：
[1] Centre of Hydraulic Research, Lutin, 783 50
[2] SIGMA Research and Development Institute, Lutin, 783 50
来源：
International Journal of Fluid Machinery and Systems | 2012年 / 5卷 / 01期
关键词：
Cavitation; CFD; Mixed-flow pump; Unsteady flow phenomena;
D O I：
10.5293/IJFMS.2012.5.1.018
中图分类号：
学科分类号：
摘要：
This paper deals with the CFD analysis of cavitating flow in the mixed-flow pump with the specific speed of 1.64 which suffers from a high level of noise and vibrations close to the optimal flow coefficient. The ANSYS CFX package has been used to solve URANS equations together with the Rayleigh-Plesset model and the SST-SAS turbulence model has been employed to capture highly unsteady phenomena inside the pump. The CFD analysis has provided a good picture of the cavitation structures inside the pump and their dynamics for a wide range of flow coefficients and NPSH values. Cavitation instabilities were detected at 70% of the optimal flow coefficient close to the NPSH3 value (NPSH3 is the net positive suction head required for the 3% drop of the total head of the pump).
引用
收藏
页码：18 / 29
页数：11
相关论文
共 20 条
  • [1] Os M.J., de Woerd O.J.G.H., Jonker J.B., A Parametric Study of the Cavitation Inception Behaviour of a Mixed-Flow Pump Impeller Using a Three-Dimensional Potential Flow Model, Proc. ASME FEDSM97-3374, (1997)
  • [2] Nagahara T., Sato T., Okamura T., Effect of the Submersed Vortex Cavitation Occurred in Pump Suction Intake on Hydraulic Forces of Mixed Flow Pump Impeller, pp. 1-8, (2001)
  • [3] Sedlar M., Numerical Investigation of Flow in Mixed-Flow Pump with Volute, TASK QUARTERLY, 5, 4, pp. 595-602, (2001)
  • [4] Sedlar M., Marsik F., Safarik P., Numerical Analysis of Cavitated Flows in Mixed-Flow Pump Impellers, Int. Conference on Transport Phenomena in Multiphase Systems, Heat, 2002, pp. 461-466, (2002)
  • [5] Sedlar M., Zima P., Muller M., CFD Analysis of Cavitation Erosion Potential in Hydraulic Machinery, IAHR WG Meeting, 2009, pp. 205-214, (2009)
  • [6] Oh H.W., Design Parameter to Improve the Suction Performance of Mixed-Flow Pump Impeller, Proc. IMechE, 224, pp. 881-887, (2010)
  • [7] Harada I., Kobayashi K., Ono S., Prediction of Axial Thrust for Mixed-Flow Pumps with Vaned Diffuser by Using CFD, Int. Journal of Fluid Machinery and Systems, 3, 2, pp. 160-168, (2010)
  • [8] Kobayashi K., Chiba Y., Computational Fluid Dynamics of Cavitating Flow in Mixed Flow Pump with Closed Type Impeller, Int. Journal of Fluid Machinery and Systems, 3, 2, pp. 113-121, (2010)
  • [9] Yamamoto K., Tsujimoto Y., Backflow Vortex Cavitation and Its Effects on Cavitation Instabilities, Int. Journal of Fluid Machinery and Systems, 2, 1, pp. 40-54, (2009)
  • [10] Kamijo K., Shimura T., Watanabe M., An Experimental Investigation of Cavitating Inducer Instability, (1977)
12