Тип публикации: статья из журнала
Год издания: 2015
Идентификатор DOI: 10.1016/j.ijheatfluidflow.2015.04.001
Ключевые слова: Francis turbine, Numerical simulation, Pressure pulsation, Precession of the vortex rope, Turbulence, CFD, Computer simulation, Flow structure, Francis turbines, Hydraulic motors, Hydraulic turbines, Numerical models, Turbulence models, Calculation results, Low-frequency pressure pulsations, Nonstationary process, Numerical techniques, Reference frame, Unsteady three-dimensional flows, Vortex rope, Computational fluid dynamics
Аннотация: The paper presents results of numerical simulation of unsteady three-dimensional flow in the two high-head hydraulic turbines. The numerical technique for calculating of low-frequency pressure pulsations in a hydraulic turbine is based on the DES turbulence model and the approach of rotated reference frame. The paper also presents Показать полностьюthe analysis of the flow structure behind the runner of the turbines, as well as shows the effect of the flow structure on the frequency and intensity of non-stationary processes in the turbines. Besides, the behavior of the pulsations in the hydraulic turbines was defined. Comparison of the calculation results with the experimental data has shown close agreement between theory and experiment. (C) 2015 Elsevier Inc. All rights reserved.
Журнал: INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
Выпуск журнала: Vol. 53
Номера страниц: 183-194
ISSN журнала: 0142727X
Место издания: NEW YORK
Издатель: ELSEVIER SCIENCE INC