Propeller tip and hub vortex dynamics in the interaction with a rudder
Propeller tip and hub vortex dynamics in the interaction with a rudder
- New search for: Felli, Mario
- New search for: Falchi, Massimo
- New search for: Felli, Mario
- New search for: Falchi, Massimo
In the present paper, the interaction mechanisms of the vortices shed by a single-screw propeller with a rudder installed in its wake are addressed; in particular, following the works by Felli (2009), the attention is focused on the analysis of the evolution, instability, breakdown and recovering mechanisms of the propeller tip and hub vortices during the interaction with the rudder. To investigate these mechanisms in detail, a wide experimental activity consisting in time-resolved visualizations, velocity measurements by particle image velocimetry (PIV) and laser Doppler velocimetry (LDV) along horizontal chordwise, vertical chordwise and transversal sections of the wake have been performed in the Cavitation Tunnel of the Italian Navy. Collected data allows to investigate the major flow features that distinguish the flow field around a rudder operating in the wake of a propeller, as, for example, the spiral breakdown of the vortex filaments, the rejoining mechanism of the tip vortices behind the rudder and the mechanisms governing the different spanwise misalignment of the vortex filaments in the pressure and suction sides of the appendage.
Document information
Propeller tip and hub vortex dynamics in the interaction with a rudder
Propellerspitzen- und Drehscheiben-Wirbeldynamik in Wechselwirkung mit einem Steuerruder
Experiments in Fluids ; 51 , 5 ; 1385-1402
2011
18 Seiten, 20 Bilder, 1 Tabelle, 21 Quellen
Article (Journal)
English
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