AU-CP プロペラ単独性能の数式表示とそのプロペラ初期設計への応用

概要

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Polynomial coefficients of thrust and torque coefficients of well-known AU-CP 4 series CPP are obtained by multiple regression analysis as functions of pitch ratio, advance ratio and pitch angle. Coefficients at zero pitch angle are given in the paper. Three kinds of application are proposed and their numerical example are shown. First is design of optimum propeller. Propeller design charts like Bp chart etc. are usually used but their numerical treatment is very complexity in computerized design procedure. Employing Markussen's method, optimum propeller is easily obtained by the polynomial coefficients and numerical results show reasonable correspondence with those by Bp chart. The authors also appoint that initial pitch angle may become important design parameter in optimum CPP design. Second is estimation of open characteristics of CPP resembles to AU-CP 4 series and third is prediction of pitch angle for various CPP control method. In order to investigate adaptation to main engine, cavitation characteristics, vibration etc., designers must know pitch angle, thrust, torque and number of revolutions at each speed for planned control method. Estimation methods for N constant control, load control and DHP minimum control are proposed, by which designers can get necessary information easily at early stage of design.
社団法人日本船舶海洋工学会の論文
1981-06-30