题目：Biomechanics of Insect and Bird Flight in Unsteady Winds
时间：2014年11月21日上午9:30
地点：北京航空航天大学 流体所214会议室
报告人：Dr. Sridhar Ravi, 皇家墨尔本理工大学(RMIT)
报告摘要：Majority of biological flight occurs within the lowest region of the atmosphere, known as the atmospheric boundary layer. Airflow conditions close to the Earth’s surface are often complex, posing challenges to flight stability and control for volant taxa. Interactions between wind and the terrain result in freestream turbulence, which is characterized by rapid, unpredictable changes in wind speed and direction. Relatively little is known about how well flying animals can contend with complex, adverse air flows, or about the flight-control mechanisms employed to mitigate the disturbances induced by unsteady winds. Insects and birds are excellent flyers, capable of maintaining flight even in adverse wind conditions. This is believed to be mainly through the use of different active and passive flight control strategies. With recent advancements in high-speed imaging technology and cross-disciplinary collaborations, we are now capable of probing the biomechanics of natural flight in realistic aerial environments. In this talk, I will be presenting on some of these investigations, in particular, I will be talking about the flight of bumblebees through an aerodynamic obstacle course and hummingbirds flying through discrete and continuous aerial disturbances.
Even if you are not into this stuff, do come along as there will be lots of cool high-speed videos!
报告人简介：Dr. Sridhar Ravi completed Bachelors of Engineering (Aerospace) and PhD from RMIT in 2007 & 2011 respectively. For his PhD, Dr. Ravi studied the influence of wind turbulence on the aerodynamic performance of wings. From 2012 he was a Post-Doc in the Dept. of Organismic and Evolutionary Biology in Harvard University where he studied insect and bird flight in complex spatial and wind environments. Dr. Ravi is currently the Vice-Chancellors Research Fellow at RMIT University conducting research on insect locomotion.
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