Development of New Type Low Drag Rudders in Propeller Slipstream
Development of New Type Low Drag Rudders in Propeller Slipstream
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发表时间：
2017
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通讯作者：
T. Kanemaru;A. Yoshitake;J. Ando
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作者：
T. Kanemaru;A. Yoshitake;J. Ando
螺旋桨滑流中的舵对螺旋桨的推进性能有很大的影响，因此估算螺旋桨与舵之间的相互作用是非常重要的。螺旋桨滑流具有工作螺旋桨产生的两个特性。一种是加速流引起的轴向速度梯度，另一种是对推进力没有贡献的周向流。许多研究人员研究了桨舵干扰问题，并开发了独特的舵或在舵上添加节能装置，以获得包括舵在内的高推进性能。本文介绍了两种新研制的低阻力高性能方向舵。一种是后掠舵，以减小速度梯度产生的舵阻;另一种是U形切口大推力舵，利用周向流有效地获得舵推力。对舵面阻力和包括这些舵面的推进性能进行了数值和实验研究。
It is very important to estimate the interaction between propeller and rudder because the rudder in the propeller slipstream has the large effect on the propulsive performance. The propeller slipstream has the two characteristics produced by the working propeller. One is the velocity gradient in the axial direction by the accelerated flow and the other is the circumferential flow which does not contribute to the propulsive force. Many researchers have studied the propeller-rudder interaction problem and developed the unique rudders or energy saving devices added on the rudder in order to get the high propulsive performance including the rudder. This paper presents the two kinds of newly developed rudders for the low drag and high performance. One is the swept back rudder to reduce the rudder drag produced by the velocity gradient and the other is the high thrust rudder with U-shaped notch which utilizes the circumferential flow to obtain the rudder thrust effectively. The rudder drag and the propulsive performance including these rudders are investigated numerically and experimentally.