QCM法による定常プロペラ性能の実用的計算法

概要

論文の詳細を見る
This paper presents, from the practical point of view, a calculation method for the characteristics of open-water propeller based on the so-called QCM. The QCM method has been highly appraised in this field, because of its simplicity, and especially of its reasonableness in obtaining proper solution for various types of propellers. But there exists certain problem, in calculating following the QCM method, which shows unreasonable vortex distribution especially near the tip of propeller. This requires, necessarily, sufficient number of discrete loading points as many as possible, and also large storage computer in order to obtain the proper solution. Concerning this feature in applying the QCM, the modified bound vortex system is introduced in this paper, which improves the unreasonable distribution. Furthermore, the pressure distribution on the propeller surface is also obtained by using the solution obtained from the QCM method and the concept of the equivalent 2-dimensional foil section, which consequently shows good agreement with the experimental results. Other problems referring to the effects of boss and trailing vortex contraction are also studied.
社団法人日本船舶海洋工学会の論文
1991-09-04