In this study, the morphology of cavitation about two marine propellers (four bladed and two bladed) is investigated numerically. A compressible, multiphase Volume of Fluid method integrated with an advanced energy equation is employed to reveal the flow physics around the propeller. Low numerical dissipation is achieved with the use of a Kurganov-Tadmor central flux scheme and a compressible fraction step method for the pressure velocity coupling. The mass transfer source terms in the continuity, momentum and energy equations are modelled with the Schnerr and Sauer cavitation model which is modified to ensure the boundedness of volume fraction in each computational unit. Following this, a Ffowcs Williams and Hawkings formulation 1A model is utilised to approximate the acoustic pressure fluctuation caused by the formation and collapse of vortex cavity at the blade tip of the two bladed propeller. Qualitative comparison of the simulations and experimental visualisations demonstrates the good ability of the developed code to model propeller cavitation. Further investigations are needed to fully validate the acoustic model.

Item Type:	Refereed Conference Paper
Keywords:	cavitation, hydrodynamic noise, compressible flow, volume of fluid, central flux scheme, fraction step method
Research Division:	Engineering
Research Group:	Automotive Engineering
Research Field:	Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
Objective Division:	Transport
Objective Group:	Environmentally Sustainable Transport
Objective Field:	Environmentally Sustainable Transport not elsewhere classified
Author:	Yu, H (Mr Hongjiang Yu)
Author:	Garaniya, V (Dr Vikram Garaniya)
ID Code:	123262
Year Published:	2017
Deposited By:	NC Maritime Engineering and Hydrodynamics
Deposited On:	2018-01-02
Last Modified:	2018-05-22
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