灵感来自海豚的皮肤微振动可以加速游泳
Dongyue Wang1,2, Hao Liu1,2
1Shanghai Jiao Tong University and Chiba University International Cooperative Research Center (SJTU-CU ICRC), 800 Dongchuan Road, Minhang District, Shanghai 200240, People's Republic of China.
Bioinspiration & biomimetics
|October 15, 2025
概括
海豚皮肤振动,或纵向微超声波 (LMUWs),减少阻力和增强游泳速度. 优化振动持续时间,就像较长的下游LMUW一样,最大限度地加速生物灵感推进.
科学领域:
- 流体动力学 流体动力学
- 生物力学 生物力学
- 生物启发的工程是生物启发的工程.
背景情况:
- 格雷悖论突出了海豚的高速游泳,超过了预测的能量限制.
- 众所周知,海豚皮肤微振动,特别是纵向微超声波 (LMUW),可以减少阻力.
- 了解这些振动在尾部驱动推进中的作用对于生物灵感设计至关重要.
研究的目的:
- 为了研究动态皮肤微振动对海豚类游泳表现的影响.
- 为了建模LMUW和尾翼推进之间的相互作用.
- 为了确定最佳的振动策略,以提高游泳速度.
主要方法:
- 开发一个概念的二维计算流体动力学 (CFD) 模型.
- 集成动态皮肤微振动与尾部飞推进.
- 模拟两个LMUW模式:下游旅行 (DTLMUW) 和上游旅行 (UTLMUW).
主要成果:
- DTLMUW增强了网推力,加速了游泳;它的停止降低了速度.
- UTLMUW在应用过程中减速,但在停止时增加速度.
- 最佳加速需要更长的DTLMUW和更短的UTLMUW持续时间.
- 停止振动使尾部推进能够保持速度增长;增加频率会累积增强加速.
结论:
- 动态皮肤振动是海豚高速游泳能力的关键.
- 特定的LMUW模式 (较长的DTLMUW,较短的UTLMUW) 对于净加速最有效.
- 这项研究为设计高效的生物启发推进系统提供了一个框架.
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