プロペラ後流の回転エネルギーとフィンによる回収について

概要

論文の詳細を見る
At first, the fundamental equation of the energy distribution in the flow field around a propeller and fins are derived. Next, the theoretical and experimental studies on the recovery of the rotational energy in the propeller slipstream show the following results : a) In the propeller slipstream between 0.125D and 2.0D behind propellers (D ; propeller diameter), the dissipation of the rotational energy is very weak and the rotational flow is same at every cross sections. b) The fins after propellers decrease the rotational energy in the propeller slipstream and convert the most of the energy into the work done by fin thrust. c) With increasing the number of blades, fin improve the rotational energy recovery. The increase of fin drag, however, makes the optimum blade number finite. It mainly depend on propeller loading conditions and fin chord length. d) The rudder with fins recovers the rotational energy more efficiently than without fins.
社団法人日本船舶海洋工学会の論文