プロペラ幾何形状の変化がプロペラ特性及びキャビテーション性能に及ぼす影響(その2) : 翼厚比及び翼数の変化

概要

論文の詳細を見る
Authors have reported the effect of the variation of the thickness-chord ratio and camber ratio of the SRI・B type propeller on performance in the previous paper (T. of West-Japan Society of Naval Architects, NO.78, 1989). This paper, as a part 2, deals with an investigation into the effect of variation of the blade thickness ratio with constant camber ratio and variation of the number of blades on performance of propeller in performing experiments and theoretical analyses. It may be concluded as follows, 1) It is shown that propeller open water efficiency is almost the same at and near design point, even if the blade thickness ratio change in a range of 20% compared to the prototype. Also, differences of cavity volume on back of a blade among the tested propellers are little, therefore, fluctuating pressure amplitude and cavitation noise level do not change markedly. 2) The influence of variation of number of blades on propeller efficiency is a little if the blade area ratio and blade thickness ratio are constant, and fluctuating pressure amplitude increases due to decreasing the number of blades. 3) There exist the optimum value of the thickness-chord ratio with respect to cavitation characteristics, especially from the point of view of fluctuating pressure induced by an unsteady cavitation. Optimum value of the thickness-chord ratio at 0.7 radius are approximately 0.05 for three bladed propeller, 0.055 for four bladed propeller and 0.065 for five and six bladed propeller.
社団法人日本船舶海洋工学会の論文
1990-08-26

プロペラ幾何形状の変化がプロペラ特性及びキャビテーション性能に及ぼす影響(その2) : 翼厚比及び翼数の変化

スポンサーリンク

概要

著者

関連論文

スポンサーリンク