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dc.contributor.advisorSteen, Sverre
dc.contributor.authorSkåland, Edvard Knutsen
dc.date.accessioned2016-08-26T14:01:05Z
dc.date.available2016-08-26T14:01:05Z
dc.date.created2016-06-10
dc.date.issued2016
dc.identifierntnudaim:15237
dc.identifier.urihttp://hdl.handle.net/11250/2402222
dc.description.abstractIn this master thesis different propeller design and analysis methods are presented and compared in terms of the accuracy and computational efficiency of their theory. These methods include lifting line, vortex lattice lifting surface and panel methods. A propeller design program based on lifting line theory was developed by the author. This program has been used together with the propeller design programs OpenProp and AKPD to make six propeller designs. The designs are based on two sets of input data, making three designs for each set. Each propeller design has been analyzed for performance in the analysis software AKPA. Cavitation analyses have also been performed. An effort has been made to include a CFD (Computational Fluid Dynamics) analysis as was initially intended. Eventually this is not included due to time limitations and software issues. The objective of the thesis is to give recommendations regarding what is the most suitable propeller software. The following conclusions could be drawn from the performed analysis on the two design programs utilized in the thesis: Based on the propellers designs analyzed in this thesis, OpenProp is able to produce the better designs. Both of the OpenProp propeller designs achieves the highest efficiency as well as showing the least cavitation. OpenProp has an advantage in time required to produce a design. It is able to design and run a performance analysis in a matter of seconds. AKPD requires several minutes to produce a full design if the number of unsteady calculation iterations are set to 5 or above (which is recommended by the author for convergence). AKPD is the only design tool of the two which is able to account for effects from skew and rake. Skew is often preferred in modern propeller design in order to reduce cavitation, noise and vibrations. AKPD is set up for a seamless transition to AKPA. If AKPA is the preferred analysis program, making the designs in AKPD may end up saving time in the design process. While both AKPD and OpenProp are restricted to circumferentially averaged inflow, AKPD iii can account for inflow in the radial as well as the axial and tangential direction. This might be of importance for propellers with high shaft angles or high rake.
dc.languageeng
dc.publisherNTNU
dc.subjectMarin teknikk, Marin hydrodynamikk
dc.titleThe influence of the choice of propeller design tool on propeller performance
dc.typeMaster thesis
dc.source.pagenumber87


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