20.500.12556/DKUM-66232 Torsional vibrations at guide-vane shaft of pump-turbine model This article focuses on the problem of guide-vane vibrations of reversible pump-turbines, especially, in the pump mode. These vibrations are transmitted to the guide-vane shaft torque. The guide-vane vibrations are caused by the impeller exit flow, which has a turbulent and partly nondeterministic property. Experimentally determined flow velocities at the impeller exit are given. The mathematical models for theoretical torsional vibration prediction formulated using linear and nonlinear differential equations are presented. The results of theoretical calculations are compared with measurements results. The possibility of transferring the parameters from the model to the prototype is discussed. pump-turbines oscillations guide-vane shaft torsional vibrations črpalne turbine oscilacije vodilna lopatica torzijske vibracije true false true Angleški jezik Slovenski jezik Znanstveno delo 2017-06-15 11:49:07 2017-06-15 11:52:25 2022-07-10 03:07:02 2021-05-15 03:34:09 1997 0 0 str. 153-162 št. 3 Letn. 4 1997 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1070-9622 621.224.7 15155205 2686742 10.3233/SAV-1997-4302 1070-9622 URN:SI:UM:DK:FIAJ6Q6I Shock_and_Vibration_1997_Predin_Torsional_Vibrations_at_Guide-Vane_Shaft_of_Pump–Turbine_Model.pdf Shock_and_Vibration_1997_Predin_Torsional_Vibrations_at_Guide-Vane_Shaft_of_Pump–Turbine_Model.pdf 1 B5D58CA4BF96573F24830108D239C3F6 11810d1e864892a096df752833e98d0254b210e885447888c84c1cdb060f61e5 404a49bd-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=112606 https://www.hindawi.com/journals/sv/1997/725347/abs/ 1 https://dk.um.si/Dokument.php?lang=slv&id=112605 Fakulteta za strojništvo 0 0 0