Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.1134/s0869864323010055
Ключевые слова: pressure pulsations, Francis turbine, re-connection, modeling, hydroelectric power station, thermodynamics
Аннотация: The influence of asymmetric boundary conditions on flow regimes in a model hydraulic turbine has been investigated. The curved draft tube is shown to have almost no effect on the vortex structure, preserving such a phenomenon as the re-connection of the vortex core. The axial and tangential velocity profiles also remain unchanged. Показать полностьюThere is a change in pressure pulsations, despite the similarity of the average values and the unsteady vortex flow pattern. In the case of an asymmetric model, the pressure pulsation is higher than for a symmetric model. This may indicate a superposition of pulsations, caused by the rotation of a precessing vortex core, with generated longitudinal (synchronous) pressure fluctuations.
Журнал: Thermophysics and Aeromechanics
Выпуск журнала: Т.30, №1
Номера страниц: 37-42
ISSN журнала: 08698643
Место издания: Новосибирск
Издатель: Фонд "Центр поддержки науки и культуры"