报告题目：         

Aerodynamic Performance and Low Dimensional Analysis of Wing Surface Morphing in Bio-inspired Flapping Flight

报告人:                    Prof. Haibo Dong

Department of Mechanical and Aerospace Engineering,

University of Virginia, Charlottesville, VA 22904

时间：2016年8月19日(周五)  10:30    

地点：中国科学院力学研究所会议中心207会议室

报告摘要：

Flapping with morphing wings is a hallmark of insect/bird flight in nature, but achieving biological levels of aerodynamic performance in the bio-inspired flying robot design has proven elusive. In this talk, a combined experimental and computational approach is employed to study the aerodynamic role of dynamic wing morphing in dragonfly flight. A 3D image-based surface reconstruction method is firstly used to obtain the kinematics and deformation of dragonfly wings from high-quality high-speed videos. The observed wing surface morphing is highly complex and a number of modeling methods including singular vector decomposition (SVD) are used to obtain the fundamental kinematical modes with distinct motion features. An in-house, Cartesian-grid-based immersed boundary solver is then used to simulate corresponding unsteady flows in all their complexity and evaluate their aerodynamic performance. The results show that the chord-wise deformation modes play key roles in the attachment of leading-edge vortex, thus improve the performance of the flapping wings. The findings from this work are expected to bring new insights on the design of next generation bio-inspired robotic systems.

 Bio-sketch

报告人简介：

Dr. Haibo Dong is currently an associate professor of Mechanical and Aerospace Engineering at the University of Virginia （UVA, 弗吉尼亚大学). Prior to his position at UVA, Dr. Dong was an associate professor of Mechanical Engineering at the Wright State University. He completed both his bachelor and master degrees in China and obtained his Ph.D. degree in Aerospace Engineering from UCLA in United States. After completing his doctorate, he spent three years as a post-doctoral researcher at the George Washington University. His current research involves computational fluid dynamics (CFD), fluid-structure interaction, low speed aero/hydrodynamics, flow visualization, flying and swimming, and biological fluid dynamics in nature. His presentation work is currently supported by the National Science Foundation (NSF).

Dong is the recipient of a number of national and society awards in US, including the NSF CAREER award, the AIAA Foundation Abe Zarem Educator award, and the APS/DFD Gallery of Fluid Motion best video award etc. More information can be found from http://pages.shanti.virginia.edu/FSRG/

报告联系人：沈楠  (office@lnm.imech.ac.cn 82543935)