An experimental analysis of fluid structure interaction on a flexible hydrofoil in various flow regimes including cavitating flow
TypeArticles dans des revues avec comité de lecture
The structural response of a rectangular cantilevered flexible hydrofoil submitted to various flow regimes is analyzed through an original experiment carried out in a hydrodynamic tunnel at a Reynolds number of 0.75 × 10 6 . The experiment considers static and transient regimes. The latter consists of transient pitching motions at low and fast pitching velocities. The experiments are also performed for cavitating flow. The structural response is analyzed through the measurement of the free foil tip section displacement using a high speed video camera and surface velocity vibrations using a laser doppler vibrometer. In non cavitating flows, it is shown that the structural response is linked to the hydrodynamic loading, which is governed by viscous effects such as laminar to turbulent transition induced by Laminar Separation Bubble (LSB), and stall. It is also observed that the foil elastic displacement depends strongly on the pitching velocity. Large overshoots and hysteresis effect are observed as the pitching velocity increases. Cavitation induces a large increase of the vibration level due to hydrodynamic loading unsteadiness and change of modal response for specific frequencies. The experimental results presented in this paper will help to develop high fidelity fluid–structure interaction models in naval applications.
Showing items related by title, author, creator and subject.
DUCOIN, Antoine; DENISET, François; ASTOLFI, Jacques Andre; SIGRIST, Jean-François (Elsevier, 2009)The present study is developed within the framework of marine structure design operating in transient regimes. It deals with an experimental and numerical investigation of the time–space distribution of the wall-pressure ...
DUCOIN, Antoine; ASTOLFI, Jacques Andre; GOBERT, Marie-Laure (ELSEVIER, 2012)This paper aims at characterizing experimentally laminar to turbulent transition induced vibrations. Here, the transition is known to be triggered by a Laminar Separation Bubble that results from a laminar separation of ...
AKCABAY, Deniz Tolga; CHAE, Eun Jung; YOUNG, Yin Lu; DUCOIN, Antoine; ASTOLFI, Jacques Andre (ELSEVIER, 2014)The objective of this work is to investigate the influence of cavity-induced vibrations on the dynamic response and stability of a NACA66 hydrofoil at 8° angle of attack at Re=750 000 via combined experimental measurements ...
Effect of the laminar separation bubble induced transition on the hydrodynamic performance of a hydrofoil DELAFIN, Pierre Luc; DENISET, François; ASTOLFI, Jacques Andre (ELSEVIER, 2014)The present study deals with the effect of the laminar separation bubble (LSB) induced transition on the lift, drag and moment coefficients of a hydrofoil. A 2D numerical study, based on the SST γ –Reθ transition model of ...
DROUEN, Laurent; CHARPENTIER, Jean-Frederic; HAUVILLE, Frédéric; ASTOLFI, Jacques Andre; SEMAIL, Eric; CLENET, Stéphane (SHF, 2013)Le travail présenté concerne le développement d’une méthodologie de conception de systèmes hydroliens innovants de type RIM-DRIVEN pour la récupération de l’énergie des courants de marée. L’originalité d’un système RIM-DRIVEN ...