Seminar - The Propulsion of Flying and Swimming Animals by Prof. Yongliang Yu
日期：2017 年 08 月 24 日 ( 星期四)
Time：11:00 am – 12:00 pm
Animal propulsion is an interesting field for Engineers and Biologists. Why does an insect fly with high frequently flapping wings, and how a fish turns fast? In this talk, the propulsion of flying insect/bat and self-propelled swimming fish will be introduced. In order to answer the questions, theoretical modelling is applied, and two dimensional physical models are established. The results showed that the unsteady aerodynamic lift generated by insect wing depends on the high frequent flapping, which reduced the limitation of the low Reynolds number, and the active morphing wing of bats can produce high lift and thrust. In fish swimming, the self-propelled model following the conservation of linear and angular momentum is proposed and used to revisit the wake structure in fish cruising, and the cruising energy-utilization ratio. Moreover, it was found that the traveling curvature wave plays an important role in fish C-start (a kind of fast turning).
Prof. Yongliang Yu is currently a full professor in the School of Engineering Science at University of Chinese Academy of Sciences. He received his B.S. and Ph.D. degrees from the University of Science and Technology of China. Prof. Yu’s research interests focus on biofluiddynamics in animal flying or swimming, vortex dynamics, unsteady flow and control. For his work on “Theoretical Modeling of the biological propulsion in fish swimming and bat/insect flight”, he has won the second class natural science award of CSTAM MECHANICS PRIZE in 2016.