The gap size effect on leakage flow and cavitation in the clearance of a 2D hydrofoil: High-speed visualization and velocity measurements

Описание

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

Конференция: 29th IAHR Symposium on Hydraulic Machinery and Systems, IAHR 2018; Kyoto; Kyoto

Год издания: 2019

Идентификатор DOI: 10.1088/1755-1315/240/6/062040

Аннотация: In the study, tip-clearance cavitation inception and development was studied in the gap between an end face of a NACA0022-34 hydrofoil and a transparent sidewall of a test channel. The experiments were carried out for the attack angles of 3° and 9° and the gap width of 0.4 to 0.8 mm under various flow conditions on the cavitation nПоказать полностьюumber. In order to observe the tip-clearance cavitation inception and its dynamics, a high-speed visualization was applied. The leakage flow velocity was measured inside the clearance by a modified PTV technique. It was shown that unsteady dynamics of the primary cavity on the foil suction side affects the leakage flow direction and the gap cavitation evolution. An increase of the gap width causes the gap cavitation to be initiated at higher cavitation numbers.

Ссылки на полный текст

Издание

Журнал: IOP Conference Series: Earth and Environmental Science

Выпуск журнала: 240

Номера страниц: 062040

Издатель: Institute of Physics Publishing

Авторы

  • Pervunin K.S. (Kutateladze Institute of Thermophysics,Siberian Branch of the Russian Academy of Sciences)
  • Timoshevskiy M.V. (Kutateladze Institute of Thermophysics,Siberian Branch of the Russian Academy of Sciences)
  • Zapryagaev I.I. (Kutateladze Institute of Thermophysics,Siberian Branch of the Russian Academy of Sciences)
  • Markovich D.M. (Institute of Power Engineering,Tomsk Polytechnic University)
  • Semenov G.A. (Public Joint-Stock Company Power Machines (LMZ))
  • Zakharov A.V. (Public Joint-Stock Company Power Machines (LMZ))

Вхождение в базы данных