非線形定常プロペラ揚力面の数値解法とその応用例

概要

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Rake and variable pitch distribution are not considered in linear prop. lifting surface which is often applied for prop. design. In cases of highly skewed prop. (HSP) which large forward rake is adopted and controllable pitch prop. at off-design condition which has extreme variable pitch distribution, there comes to large difference between geometrical prop. shape and linear lifting surface model. This paper is concerned with a numerical method (mode function method) for non-linear steady prop. lifting surface in which vortex is exactly placed on prop. pitch plane and radial component of velocity is taken into consideration. Result of comparative calculation with linear lifting surface is reported. Then, presented method is applied for 72°HSP (MPNO. 80-5) design in order to get high prop. open efficiency. Prop. open tests of MAU type conventional prop. (MPNO. 80-3) and 90°HSP (MPNO. 80-4) designed without particular consideration about efficiency and above mentioned 72°HSP are performed. Propeller open efficiency of MPNO. 80-5 at prop. design point is about same as that of MPNO. 80-3, even though prop. open efficiency of MPNO. 80-4 at design point is about 2% lower than that of MPNO. 80-3, which reveals utility of present method for HSP design.
社団法人日本船舶海洋工学会の論文
1981-08-27