Affiliation:
1. Department of Mechanical and Industrial Engineering Technology, University of Johannesburg, Doornfontein Campus, Corner of Siemert and Beit Streets, Johannesburg 2028, South Africa
Abstract
The study numerically investigated the noise dissipation, cavitation, output power, and energy produced by marine propellers. A Ffowcs Williams–Hawkings (FW–H) model was used to determine the effects of three different marine propellers with three to five blades and a fixed advancing ratio. The large-eddy Simulations model best predicted the turbulent structures’ spatial and temporal variation, which would better illustrate the flow physics. It was found that a high angle of incidence between the blade’s leading edge and the water flow direction typically causes the hub vortex to cavitate. The roll-up of the cavitating tip vortex was closely related to propeller noise. The five-blade propeller was quieter under the same dynamic conditions, such as the advancing ratio, compared to three- or four-blade propellers.
Subject
Applied Mathematics,Computational Mathematics,General Engineering
Reference36 articles.
1. Bretschneider Herbert Bosschers, J., Hwan Choi, G., Ciappi, E., Farabee, T., Kawakita, C., and Tang, D. (2023, January 23). Specialist Committee on Hydrodynamic Noise. Available online: https://www.ittc.info/media/6091/sc-noise.pdf.
2. Numerical analysis of marine propellers low frequency noise during maneuvering;Dubbioso;Appl. Ocean Res.,2020
3. Numerical cavitation noise prediction of a benchmark research vessel propeller;Sezen;Ocean Eng.,2020
4. Design optimisation of Propeller Boss Cap Fins for enhanced propeller performance;Mizzi;Appl. Ocean Res.,2017
5. Franc, J.-P., and Michel, J.-M. (2005). Fundamentals of Cavitation, Kluwer Academic Publishers.