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相关概念视频

Typical Model Studies01:30

Typical Model Studies

337
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
337
Modeling and Similitude01:12

Modeling and Similitude

245
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
245
General External Flow Characteristics01:26

General External Flow Characteristics

85
The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
85
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

121
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
121

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相关实验视频

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Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging
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生物海豚尾翼的水力动力学特征研究基于双向流体结构相互作用模拟.

Ning Wang1, Yu Zhang1, Linghui Peng1

  • 1College of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China.

Biomimetics (Basel, Switzerland)
|January 24, 2025
PubMed
概括

灵活的,厚度可变的生物海豚尾翼增强了推进力. 不对称的运动增加了推力,但可以通过增加投球时刻来降低稳定性,为更好的游泳性能提供设计见解.

科学领域:

  • 生物模拟学是一种生物模拟学.
  • 流体动力学 流体动力学
  • 机器人技术 机器人技术 机器人技术

背景情况:

  • 海豚尾的运动是流体动力学和结构力学的复杂相互作用.
  • 生物设计旨在复制水下车辆的高效生物推进.
  • 了解结构变化和运动对性能的影响对于生物设计至关重要.

研究的目的:

  • 模拟和分析使用流体结构相互作用的生物海豚尾的推进性能.
  • 研究结构参数 (例如,厚度变化) 和运动模式对推力产生和稳定性的影响.
  • 对实验数据进行数值模拟方法的验证.

主要方法:

  • 利用双向流体结构相互作用 (FSI) 技术进行数值模拟.
  • 模拟了仿生海豚尾的背部腹部运动.
  • 通过水下运动实验验验证了数值模型.

主要成果:

  • 与刚性设计相比,灵活的尾翼显示出增强的推进能力.
  • 不同厚度的柔性,模仿真正的海豚解剖学,表现优于相同厚度的.
  • 不对称的运动模式增加了推力,但也增加了俯冲矩,可能降低了稳定性.
  • 提升运动之间的频率和振幅比率 (F和H) 的差异增加,放大了投球时刻.
关键词:
不对称的运动运动.双向流体 结构 相互作用生物尾翼是生物尾翼.灵活性 灵活性 灵活性水力动力学特征 水力动力学特征

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结论:

  • 灵活和可变厚度的设计是优化生物尾推进的关键.
  • 不对称的运动提供推力优势,但需要仔细控制才能保持游泳的稳定性.
  • 该研究为设计和运动控制高效的生物力推进系统提供了有价值的数据.