METHOD OF AN ALL-SPEED PROPELER
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United States of America Patent
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Issued Date -
Mar 15, 2012
app pub date -
Jul 12, 2011
filing date -
Sep 10, 2010
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Abandoned
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Abstract
A design method of an all-speed propeller includes five steps; a first step (A) of creating a basic shape of an all-speed propeller, a second step (B) of optimization of circulation distribution, a third step (C) of adjusting the shape of the all-speed propeller, a fourth step (D) of analysis of thrust and torsion and fifth step (E) of finishing the design of the all-speed propeller. With parameters of a design request repeatedly processed by a lifting line program, a lifting surface program and a boundary element program in the steps mentioned previously, the all-speed propeller can lower cavitation effect caused by different speeds on the capacity of the propeller, so as to enable efficiency kept rather high without sharply lowering while navigating in diverse speeds.
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