International Journal of Fluid Machinery and Systems

Korean Society for Fluid machinery (한국유체기계학회)
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Analysis on Characteristic of Pressure Fluctuation in Hydraulic Turbine with Guide Vane

  • Shi, FengXia (School of Energy and Power Engineering, Lanzhou University of Technology) ;
  • Yang, JunHu (School of Energy and Power Engineering, Lanzhou University of Technology) ;
  • Wang, XiaoHui (School of Energy and Power Engineering, Lanzhou University of Technology)
  • Received : 2015.07.10
  • Accepted : 2016.01.08
  • Published : 2016.09.30
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Abstract

An unsteady three-dimensional simulation based on Reynolds time-averaged governing equation and RNG $k-{\varepsilon}$ turbulence model, was presented for pump-as-turbine, the pressure fluctuation characteristic of hydraulic turbine with guide vane was obtained. The results show that the time domains of pressure fluctuation in volute change periodically and have identical cycles. In volute tongue and inlet pressure fluctuations are light, while in dynamic and static coupling interface pressure fluctuations are serious; In impeller blade region the pressure fluctuation of pressure surface are lighter than that of suction surface. The dominant frequencies of pressure fluctuation concentrate in low frequency region, and concentrate within 2 times of the blade passing frequency.

Keywords

References

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