Ship & Boat ›› 2021, Vol. 32 ›› Issue (03): 24-30.DOI: 10.19423/j.cnki.31-1561/u.2021.03.024

Previous Articles     Next Articles

Numerical Analysis on Scale Effect of Appendages Resistance of Twin-Screw Ship With Shaft Brackets

WEI Hong-gang1,2, ZHAN Ming-zhu3, FENG Yi1,2, MENG Yang2, YU Hai1,2   

  1. 1. The Shanghai Key Laboratory of Ship Engineering, Shanghai 20011, China;
    2. Marine Design & Research Institute of China, Shanghai 200011, China;
    3. Shanghai Merchant Ship Design & Research Institute, Shanghai 201203, China
  • Received:2020-10-13 Revised:2020-10-27 Online:2021-06-25 Published:2021-07-02

轴支架双桨船附体阻力尺度效应数值分析

韦红刚1,2, 詹明珠3, 冯毅1,2, 孟阳2, 于海1,2   

  1. 1.上海市船舶工程重点实验室 上海200011;
    2.中国船舶及海洋工程设计研究院 上海200011;
    3.上海船舶研究设计院 上海201203
  • 作者简介:韦红刚（1991-）,男,本科,工程师。研究方向：船舶快速性。詹明珠（1982-）,女,硕士,高级工程师。研究方向：船舶力学。冯 毅（1982-）,男,硕士,高级工程师。研究方向：船舶快速性。孟 阳（1990-）,男,本科,助理工程师。研究方向：船舶快速性。于 海（1980-）,男,硕士,高级工程师。研究方向：计算流体力学。

Abstract: The twin-screw ship with shaft brackets has been calculated by using the CFD software NUMECA\FineMarine, the resistance increments of the bow thrust tunnel, shaft bossing and shaft brackets at the different scales are calculated, the scale effect of the appendage resistance, wave pattern and the wake of the hull with shaft-brackets are analyzed. The results show that it is feasible to study the scale effect of the twin-screw ship with shaft-brackets by changing the length of the model based on CFD methods. Since the local Reynolds number of the appendage region is much smaller than the hull Reynolds number, the resistance increments of the three appendages become stable when the hull Reynolds number is larger than 108. The Reynolds number for the model test of the twin-screw ship with shaft-brackets should be as large as possible in order to reduce the influence of the scale effect.

Key words: twin-screw ship with shaft-brackets, appendages resistance increment, appendage scale effect

摘要： 针对轴支架双桨船型,使用 CFD软件NUMECA\FineMarine计算了不同尺度下的侧推孔、轴包套、轴支架的阻力增量,并分析了带轴支架船体的附体阻力、波形和伴流的尺度效应。结果表明：基于CFD的方法,通过改变模型长度研究轴支架双桨船附体的尺度效应是可行的;由于附体区域的局部雷诺数远小于船体雷诺数,当船体雷诺数>108之后,3个附体的阻力增量才基本稳定;为了减小尺度效应影响,轴支架双桨船模型试验的雷诺数应尽可能大些。

关键词: 轴支架双桨船, 附体阻力增量, 附体尺度效应

CLC Number: