• 作者： 林武文; 柯永澤
• 作者服務機構： 中山科學院電子研究所; 海洋大學造船系
• 中文摘要： 螺槳艉流中所含之切向誘導速度，構成不平衡之角動量與損失之旋向動能，此角動量之變化量即等於螺槳轉矩，亦為AUV發生旋轉的主因，造成潛體操作方面的困難，因此若能平衡螺槳艉流中的角動量，即可使潛體平衡。基於此觀念，吾人將在螺槳前設計一組導流翼，使其產生與螺槳艉流之角動量相反的轉矩，達成螺槳轉矩平衡（Torquebalance），潛體不發生旋轉的目的。 基於以上之構想，本文旨在建立一求解導流翼與螺槳交互作用並對其環流分佈作最佳化之理論，升力線理論被用來求導流翼之環流分佈，半無窮渦柱理論將被用來計算導流翼洩出之自由渦面對螺槳之誘導速度及螺槳自由渦面對導流翼之誘導速度。關於螺槳設計方面，本文應用Coney之變分法來作螺槳於導流翼後之最佳化設計，最後並由實驗證明，導流翼除可以有效達到螺槳轉矩平衡之目的外，亦可提高效率與明顯改善螺槳轂部渦流空泡之現象。
• 英文摘要： The tangential velocity in a propeller race will cause unbalanced angular momentum and rotationalkinetic energy. The rotational kinetic energy is a part of the propeller energy loss, and the rate of angularmomentum is equal to the propeller torque. The angular momentum causes a submerged body to rotateand makes it hard to maneuver Thus, a stator in front of the propeller is designed to produce the sametorque as that of the propeller, so that torque balance can be reached between the stator and propeller. In this paper, the lifting line theory will be applied to the design of the stator. The semi-infinitevortex cylinder theory is adopted to determine the velocity on the propeller induced by the free vortexsheet of the stator, and the velocity on the stator induced by the free vortex sheet of the propeller. Concerningpropeller design, variation calculus is used to optimize the propeller circulation distribution. Finally, theresults of experiments show that the stator in front of a propeller can easily achieve propeller torque balanceand can obviously improve propeller hub vortex cavitation.
• 中文關鍵字： propeller; torque balance; guide wing(stator)
• 英文關鍵字： --