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The Effect of an Unconventional Tip Geometry on Propeller Tip Flow Phenomena
C.T. Chen;J.L. Hwang;C.Y. Hsin;Y.Z. Kehr;C.C. Lin
|Contributors: ||NTOU:Department of Systems Engineering and Naval Architecture|
|Keywords: ||Tip Vortex;Boundary Element Method;RANS Method|
|Issue Date: ||2011-10-20T08:12:59Z
|Abstract: ||Abstract:In this paper, a methodology which consists of numerical analysis and experimental tests will be established and used to investigate the effects of one special kind of propeller tip geometry, namely, the "tip fillet", on tip flow phenomena. The design process of this unconventional propeller tip geometry is first described, and several different designs are then demonstrated in the paper. Both the potential flow boundary element method and the viscous flow RANS method are used to compute the forces and flow field of these propellers with different tip geometries. In order to be confident about the computations, computational results from both potential flow and viscous flow methods are compared to each other and carefully verified, The criteria of determining which tip geometry is better to the formation of tip vortex are then discussed in the paper. It comes to the conclusion that the unconventional propeller tip geometry presented in this paper is more effective in controlling tip vortex formation than conventional tip geometry, and the effects are different for different designs. Finally, experimental results of designed tip geometries are investigated and compared to that of conventional tip geometry to confirm the computational results.|
|Relation: ||25(4), pp.181-192|
|Appears in Collections:||[系統工程暨造船學系] 期刊論文|
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