| 章永华.尾鳍面积对摆动推进力大小的影响[J].轻工机械,2019,37(6):39-43 |
| 尾鳍面积对摆动推进力大小的影响 |
| Influence of Caudal Fin Area on Thrust Generation During Oscillating Motion |
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| DOI：10.3969/j.issn.1005 2895.2019.06.008 |
| 中文关键词: 仿生学 尾鳍 漏空区域 推进力 摆动 |
| 英文关键词:bionics caudal fin leaking area thrust oscillation |
| 基金项目:浙江省自然科学基金项目（LY15E060001）。 |
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| 摘要点击次数: 1294 |
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| 中文摘要: |
| 目前，尾鳍面积对游动性能影响的研究大多采用鳍面整体缩放而鲜有通过设置漏空区域来改变面积的方法。笔者以新月形尾鳍为研究对象，建立尾鳍三维运动学模型。选择矩形和圆形2种漏空区域，在漏空区域面积不变的前提下，利用计算流体动力学原理，研究了漏空区域形状和分布对推力的影响。给出了尾鳍表面压力分布和无量纲阻力系数变化情况，结合尾鳍不同切面涡结构，揭示通过在尾鳍表面设置漏空区域调节推进力的规律。该研究成果为优化尾鳍摆动推进力提供了参考。 |
| 英文摘要: |
| Nowadays, most studies on the influence of caudal fin area on swimming performance adopt the method of overall fin surface scaling and rarely change the area by setting the leakage area. A three dimensional kinematic model of crescent shaped caudal fin was established. The rectangular and circular leaking areas were selected. By taking the advantage of computational fluid dynamics (CFD), the influences of shape and distribution of the leaking area on the thrust were investigated under the premise of the same total leaking area. The pressure distribution of the caudal fin surface and the non dimensional drag coefficient were presented. According to the vortex structure on the different slices of the caudal fin, the regularity of adjusting propulsion force by setting a leaking area to the fin surface were revealed. The research provides a reference for the optimization of propulsion thrust of a caudal fin during oscillating motion. |
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