Article

Mechanism of emergence of intense vibrations of turbines on the Sayano-Shushensk hydro power plant

Journal of Applied Mechanics and Technical Physics (Impact Factor: 0.27). 07/2010; 51(4):590-597. DOI: 10.1007/s10808-010-0075-1

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

1 Follower
 · 
102 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: Methods of calculating, and experimental results of research on, unsteady flow in aerodynamic cascades of turbomachines are set forth. The conditions of excitation and damping of blade vibration in compressible and incompressible fluid flow are considered. The theoretical methods are based upon a model of an ideal fluid. The incoming stream may be inhomogeneous and have vortices due to the influence of a preceding cascade. The experimental results pertain to determination of the dynamic stresses brought about by stream inhomogeneity in the turbomachine, as well as to determination of the unsteady aerodynamic forces which excite and damp blade vibrations. Consideration is given to the origination of cascade flutter and the effect of inhomogeneity of an aerodynamic cascade. The experimental research methods are described.
  • [Show abstract] [Hide abstract]
    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(1):34-45. DOI:10.1007/s10697-005-0041-4 · 0.32 Impact Factor
  • Journal of Applied Mechanics and Technical Physics 01/1993; 34(2):239-246. DOI:10.1007/BF00852519 · 0.27 Impact Factor
Show more