二重反転プロペラの研究(第2報) : 舵との干渉について

概要

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Contrarotating Propellers (CRP) are one of most attractive propulsion devices, which can be expected to improve the propulsive efficiency remarkably. Although the major problem seems to be on the mechanical side, the uncertainty in efficiency of CRP at the behind condition is also important problem which spoils the interest of ship builders or ship owners. This paper deals with this problem by using the simplified propeller theory and the interaction theory between CRP and rudder. At first, the simplified propeller theory is used in order to estimate the increament of efficiency due to CRP by decomposing the efficiency loss of conventional propeller. Then, the effect of rudder is investigated as for a conventional propeller and CRP using the interaction theory. The calculations are compared with the experiments which were conducted with a 7.8m tanker model. Through comparisons of the calculated and experimental results, we confirm that the interaction theory of CRP and a rudder is useful.
社団法人日本船舶海洋工学会の論文
1988-03-22