Тип публикации: статья из журнала
Год издания: 2014
Идентификатор DOI: 10.1134/S0869864314060055
Ключевые слова: draft tube, vortex core precession, unsteady flow, hybrid RANS-LES methods, pressure fluctuations, Hydraulic turbines, Navier Stokes equations, Numerical methods, Tubes (components), Turbines, Turbulent flow, Vorticity, Draft tubes, Hybrid method, Integral characteristics, Numerical investigations, Pressure fluctuation, Synchronous components, Vortex cores, Vortex flow
Аннотация: Numerical modeling of the unsteady flow in the draft tube of the test bench hydro turbine is conducted. The hybrid RANS-LES methods for modeling turbulent flows are compared. The intensity and frequency of pressure fluctuations, which are induced by the vortex core precession under the runner, and the integral characteristics are cПоказать полностьюonsidered. An analysis of the synchronous and asynchronous parts of pressure fluctuations is done; the generating and influence of the synchronous component of fluctuations are considered. The vortex core interaction with the draft tube elbow is considered.
Журнал: THERMOPHYSICS AND AEROMECHANICS
Выпуск журнала: Vol. 21, Is. 6
Номера страниц: 707-718
ISSN журнала: 08698643
Место издания: NEW YORK
Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER