Numerical investigation of hydroacoustic pressure pulsations due to rotor-stator interaction in the Francis-99 turbine : доклад, тезисы доклада


Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: Francis-99 Workshop: Fluid Structure Interactions in Francis Turbines; Trondheim; Trondheim

Год издания: 2019

Ключевые слова: Cfd, Francis turbine, hydroacoustic, Les, numerical simulation, pressure pulsation, the precession of the vortex rope, turbulence

Аннотация: 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 bПоказать полностьюy 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.

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Журнал: Journal of Physics: Conference Series

Выпуск журнала: 1296

Номера страниц: 012009

Издатель: Institute of Physics Publishing


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