Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Energy and hydrodynamic studies of turbine operating regimes of large pumping stations
Conclusions The possibility of operation of axial-flow pump units in a turbine regime was proved experimentally.To provide efficient operation of the PSs in pump and turbine regimes it is expedient to carry out double regulation by means of the runner blades and gate vanes.The maximum efficiency values of the model of the PSs withD1=350 mm are 81.5% in the turbine regime and 86.0% in the pump regime.The zones of the optimal efficiency values of the characteristics of the pump and turbine regime do not coincide by 20–25% with respect to the reduced rotational speed. For matching the operation of the unit in the optimal zones of both regimes it is recommended to use a static frequency changer.The blade frequency, frequency of revolution, and low-frequency oscillations excited by the vortex line behind the runner are the dominant frequencies of the pressure fluctuation process in turbine regimes with maximum energies.
Energy and hydrodynamic studies of turbine operating regimes of large pumping stations
Conclusions The possibility of operation of axial-flow pump units in a turbine regime was proved experimentally.To provide efficient operation of the PSs in pump and turbine regimes it is expedient to carry out double regulation by means of the runner blades and gate vanes.The maximum efficiency values of the model of the PSs withD1=350 mm are 81.5% in the turbine regime and 86.0% in the pump regime.The zones of the optimal efficiency values of the characteristics of the pump and turbine regime do not coincide by 20–25% with respect to the reduced rotational speed. For matching the operation of the unit in the optimal zones of both regimes it is recommended to use a static frequency changer.The blade frequency, frequency of revolution, and low-frequency oscillations excited by the vortex line behind the runner are the dominant frequencies of the pressure fluctuation process in turbine regimes with maximum energies.
Energy and hydrodynamic studies of turbine operating regimes of large pumping stations
Vissarionov, V. I. (Autor:in) / Elistratov, V. V. (Autor:in) / Mukhammadiev, M. M. (Autor:in)
1989
Aufsatz (Zeitschrift)
Englisch
BKL:
56.30
Wasserbau
Lokalklassifikation TIB:
770/6550/8000
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