Open AccessNumerical investigation of hydroacoustic pressure pulsations due to rotor-stator interaction in the Francis-99 turbine
Author(s) -
D. V. Platonov,
А. В. Минаков,
A. V. Sentyabov
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1296/1/012009
Subject(s) - francis turbine , mechanics , stator , rotor (electric) , compressibility , computer simulation , vortex , turbine , compressible flow , flow (mathematics) , amplitude , physics , hydraulic turbines , geology , classical mechanics , acoustics , optics , thermodynamics , quantum mechanics
The paper deals with the numerical simulation of the flow in the Francis-99 hydraulic turbine at three different problem formulations, namely, the application of the method of rotating coordinate system, sliding mesh model, and consideration of a compressible fluid. The pulsations intensity and pressure pulsation spectra obtained by numerical simulation and experimentally are compared. It is shown that the simulation of a problem considering compressible fluid, and that conducted by the sliding mesh method gives significantly greater pressure amplitudes. It is also shown that the precessing vortex core is a source of pressure waves in the entire turbine flow path.