Computation and Modeling of Insect Flight

昆虫飞行的计算与建模

• 批准号: 0075510
• 负责人: Z. Jane Wang
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2004-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0075510&HistoricalAwards=false
• 关键词: Computation; Modeling; Insect; Flight

Wang0075510 The investigator and her colleagues combine moderntechniques of computation and theoretical modeling to complementcurrent experimental research in insect flight. Thesecomputations reveal the three-dimensional flows around an elasticwing that mimics the flapping motion of insects. Thecomputational results also establish a basis for developingmathematical models of vortex shedding in unsteady flows(traditionally described by the unsteady Kutta condition). Asolution of this longstanding problem in fluid mechanics wouldhelp to lay the foundation for a general theory of flappingflight. Insect flight is fascinating in its own right, but moregenerally, it can provide insight into other fluid mechanicalproblems that involve interactions between dynamic boundaries andhighly unsteady viscous flows. The investigator explores howNature solves the problem of insect flight. The lessons learnedfrom insect flight are applicable to other physical andengineering systems where there is a tight coupling between avortex wake and the oscillating body that generated it. Examplesrange from the famous devastating Tacoma Narrows bridge accidentto our everyday experience of the dynamics of a piece of fallingpaper and the rising of bubbles in fluids. Finally, understandingthe aerodynamics of insect flight can provide a new paradigm indesigning micro-air vehicles.

研究者和她的同事将现代计算技术和理论建模相结合，以补充昆虫飞行的现有实验研究。这些计算揭示了模拟昆虫拍打运动的弹性机翼周围的三维流动。计算结果也为非定常流动（传统上由非定常库塔条件描述）中旋涡脱落的数学模型的建立奠定了基础。流体力学中这个长期存在的问题的解决将有助于为扑翼飞行的一般理论奠定基础。昆虫飞行本身就很吸引人，但更普遍的是，它可以提供对其他流体力学问题的见解，这些问题涉及动态边界和高度不稳定粘性流动之间的相互作用。研究者探索大自然是如何解决昆虫飞行问题的。从昆虫飞行中吸取的经验教训适用于其他物理和工程系统，在这些系统中，涡旋尾流和产生涡旋尾流的振荡体之间存在紧密耦合。从著名的塔科马海峡大桥事故，到我们日常经历的一张纸的下落和液体中气泡的上升。最后，了解昆虫飞行的空气动力学可以为微型飞行器的设计提供一个新的范例。