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首页> 外文期刊>International Journal of Marine Engineering Innovation and Research >Numerical Study of B-Screw Ship Propeller Performance: Effect of Tubercle Leading Edge
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Numerical Study of B-Screw Ship Propeller Performance: Effect of Tubercle Leading Edge

机译：B型螺旋船螺旋桨性能的数值研究：结节前缘的影响

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摘要

various attempts to modify the ship's propeller have been made to improve performance as a propulsion component. This paper analyzes the effect of modification of the B-Series propeller by adopting a whale fin shape (Humpback Whale). Also, it analyzes the flow in the propeller before (standard) and after modification. Modifications are made to the leading edge, which is called the tubercle leading edge (TLE). It adds and subtracts sections with a wavelength of 0.2R and amplitude of 2.5% of the chord section length in the propeller leading edge. The numerical study is used using CFD on different J values (0.2, 0.4, and 0.6). It was found that the modification of TLE has a less significant effect on performance. Instead, it decreased at a low J value (0.2). Meanwhile, the largest decrease was at a high J value (0.6), namely up to 10.4% for thrust, 4.3% for torque, and 6.4% for efficiency. Whereas at J=0.4, the torque increases only 0.4%, and the torque and thrust decrease, although less significant. The flow analysis indicates that the shape of the TLE provides a decrease in pressure. However, on the positive side, this modification provides a reduction in noise on the propeller surface.
机译：已经尝试修改船舶螺旋桨，以提高作为推进部件的性能。本文通过采用鲸鱼翅片形状（驼背鲸）来分析B系列螺旋桨改造的效果。此外，它在（标准）之前和修改后分析了螺旋桨的流动。修改到前缘，称为结节前沿（TLE）。它在螺旋桨前缘中的波长为0.2R的波长和2.5％的2.5％的幅度中的部分添加和减去部分。使用CFD在不同J值（0.2,0.4和0.6）上使用数值研究。发现TLE的改性对性能不太显着。相反，它以低j值（0.2）减小。同时，最大的减少在高J值（0.6），即推力的增长率高达10.4％，扭矩为4.3％，效率为6.4％。虽然在J = 0.4，扭矩仅增加0.4％，并且扭矩和推力降低，但虽然不太显着。流程分析表明，TLE的形状提供了压力的降低。然而，在正面，该修改可降低螺旋桨表面的噪声。

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