

@mastersthesis {7074,
	title = {Modelling the wash from a ship{\textquoteright}s propeller},
	year = {1998},
	note = {U100929},
	school = {Queen{\textquoteright}s University Belfast (United Kingdom)},
	type = {phdPh.{D}.},
	address = {Ann Arbor},
	abstract = {The characteristics of the velocity field produced by a ship{\textquoteright}s propeller were investigated using a commercial Computational Fluid Dynamics (CFD) software package.A CFD model of the propeller wash was developed using a sliding mesh technique to simulate the rotating blades of the propeller. Experimental measurements using Laser Doppler Anemometry and Pitot tube methods were used to validate the computational approach. Measurements and predictions of the axial and radial velocity fields for two propellers operating over a range of speeds were used in the validation. The results from the CFD simulation are in reasonable agreement. However, improvements to the approach used to model the turbulence in the flow may lead to a more accurate simulation.The validated CFD approach is used to investigate the propeller wash where an experimental study has been difficult or impossible to undertake. The velocity field close to the rotating blades was found to exhibit a pulsing behaviour. The characteristics of the pulsing are related to the speed of rotation and the geometrical characteristics of the rotating propeller.The tangential velocity field was found to be more prominent in the wash than the radial component of velocity. However, the axial component of velocity is the largest contributor to the resultant velocity field in the propeller wash. The formation of the tangential velocity field is related to the geometrical characteristics of the rotating blades. The diffusion characteristics of the tangential velocity field appear to be influenced by the behaviour of the axial velocity field. The maximum tangential velocity decays exponentially.The simulation of a full-size propeller was used to verify the scaling approach adopted for previous experimental investigations. The results indicated that scale effects due to viscosity were negligible, and the use of Froudian scaling for the experimental investigations was justified.},
	keywords = {(UMI)AAIU100929, 0547:Ocean engineering, Applied sciences, Bibliographies, Ocean engineering, Psychology{\textendash}Abstracting, Statistics},
	url = {http://search.proquest.com/docview/301609976?accountid=14270},
	author = {Brewster, P M}
}
