Mechanism of emergence of intense vibrations of turbines on the Sayano-Shushensk hydro power plant
ABSTRACT It is demonstrated that the level of vibrations of turbines on the Sayano-Shushensk hydro power plant is enhanced by the capability
of a compressible fluid to perform its own hydroacoustic oscillations (which can be unstable) in the turbine duct. Based on
the previously obtained results of solving the problem of natural hydroacoustic oscillations in the turbine duct and some
ideas about turbine interaction with an unsteady compressible fluid flow, results of full-scale studies of turbine vibrations
and seismic monitoring of the dam of the Sayano-Shushensk hydro power plant before and during the accident are analyzed.
Key wordshydroturbine-vibrations-cascade-acoustics-stability-natural oscillations-flutter
- Journal of Applied Mechanics and Technical Physics 01/1993; 34:239-246. · 0.25 Impact Factor
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ABSTRACT: The unsteady aerodynamic parameters of 3D blade cascades oscillating in incompressible flow are determined with account for blade geometry and the influence of the steady hydrodynamic loads acting on the blades. On the assumption of separationless flow and harmonic blade oscillations, the corresponding boundary-value problem for the amplitude function of the unsteady velocity potential component is solved in the linear formulation, using a finite-element method. Test calculation results are presented and an example of calculating the unsteady aerodynamic parameters of a hydro-turbine model is given.Fluid Dynamics 01/2005; 40:34-45. · 0.31 Impact Factor
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