Print Email Facebook Twitter Tip vortex modelling for cavitation noise applications Title Tip vortex modelling for cavitation noise applications: A verification and validation study in ReFRESCO Author Liebrand, Rens (TU Delft Aerospace Engineering) Contributor Klapwijk, Maarten (mentor) Gerritsma, Marc (mentor) van Zuijlen, Alexander (mentor) Vaz, Guilherme (graduation committee) Degree granting institution Delft University of Technology Programme Aerospace Engineering | Aerodynamics and Wind Energy Date 2019-07-12 Abstract Cavitating tip vortices of marine propellers are the main contributors to underwater radiated ship noise due to their dynamic behavior and broadband sound spectrum. Experimentally, it is challenging to get a detailed insight into the vortex structure which makes it difficult to understand the noise generating mechanisms. Although Computational Fluid Dynamics (CFD) could offer a solution to this, knowledge regarding the modelling of the inception and dynamics of tip vortex cavitation is insufficient to obtain reliable numerical results in relation to noise predictions. To this end, an extensive verification and validation study in the context of transition and turbulence modelling of an elliptical planform with NACA662−415 cross-section (`Arndt’ wing) is carried out. The finite length of the lifting surface causes the generation of a tip vortex without the additional complexity of secondary motion (propeller rotation). CFD simulations are carried out using the community based open-usage code ReFRESCO. Subject Cavitating tip vortex noiseElliptical wingReFRESCOVerification and validation To reference this document use: http://resolver.tudelft.nl/uuid:38888cc9-a116-42fa-bb2d-bdc7f407a78f Bibliographical note Part of this research has been published in `A sensitivity analysis of CFD transition modelling in the context of vortex roll-up prediction', Liebrand at al. (2019). Part of collection Student theses Document type master thesis Rights © 2019 Rens Liebrand Files PDF MSC_THESIS_LIEBRAND_RHAA_ ... _07_12.pdf 25.4 MB Close viewer /islandora/object/uuid:38888cc9-a116-42fa-bb2d-bdc7f407a78f/datastream/OBJ/view