櫓漕の推進性能に関する翼素理論による計算

概要

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In the previous paper the author and a co-author analyzed the principal mechanism of propulsion of a ship by "Ro" so as to make an automatic rowing machine of a 1/3 scale model of "Ro", and carried out open tests and self-propulsion tests of "Ro" rowed by the automatic rowing machine in the towing tank of Yokohama National University. The results of such experiments made clear the hydrodynamic characteristics of "Ro", such as possibility of high efficiency more than 70% by skillful rowing. In the present paper, the hydrodynamic characteristics of some sections of "Ro" measured in the wind tunnel are reported in C_L and C_D diagrams in the first stage and the numerical results calculated by the blade element theory of "Ro", which has been developed originally by the author, using the characteristic diagrams of sections obtained by the wind tunnel experiments are reported in the second stage. Conclusively such calculated results are compared with the experimental results measured by the above -mentioned automatic rowing machine of "Ro". Calculations are showing good tendency matching with experiments, but the quantitative agreement between the two is not necessarily good.