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SUMMARY:MEchanics GAthering -MEGA- Seminar: Talk1 - Understanding the role
  of morphology and kinematics in bio-inspired locomotion\; Talk2 - Role of
  an active trailing-edge flap of a pitching airfoil undergoing dynamic sta
 ll
DTSTART:20191024T161500
DTEND:20191024T173000
DTSTAMP:20260510T064917Z
UID:170c83f60daeea58443f1e64de4c9673137d93043b1e143588178ebe
CATEGORIES:Conferences - Seminars
DESCRIPTION:Fatma Ayancik & Guosheng He \, UNFoLD\, EPFL\nUnderstanding
  the Role of Morphology and Kinematics in Bio-Inspired Locomotion\, by Fa
 tma Ayancik\nThe development and use of bio-inspired autonomous underwater
  vehicles (AUVs) have been of great interest over the past years. If these
  vehicles’s ability to operate effectively over an extensive range of co
 nditions was enhanced\, they could be utilized for exploration in dynamic 
 environments including scientific and military surveying purposes. In this
  regard\, nature has thousands of design solutions that can operate in the
 se dynamic environments and have adaptive swimming performance\, which mak
 es them effective and efficient at a host of tasks\, and operational over 
 a wide range of conditions.\nIn this talk\, inspiring by the advanced capa
 bilities of fish and other aquatic swimmers\, we will focus on understandi
 ng fish-like propulsion in terms of morphology and kinematics. We will inv
 estigate the interplay along the morphology and kinematics and their influ
 ence on the swimming performance. With the help of Evolutionary Algorithm\
 , we will search for an optimum morpho-kinematic feature by considering th
 e three main aspects of the swimming performance: swimming speed\, swimmin
 g range\, and efficiency. Finally\, scaling laws will be presented in this
  talk to provide insight into the flow physics that drive thrust productio
 n\, power consumption\, and efficient swimming when the morphology and kin
 ematics are varied.\n\nRole of an active trailing-edge flap of a pitching 
 airfoil undergoing dynamic stall\, by Guosheng He\nThe flow around a pitc
 hing NACA0015 airfoil with an active trailing-edge flap is investigated us
 ing two-dimensional time-resolved particle image velocimetry and surface p
 ressure measurements. The airfoil is pitching around the static stall angl
 e of attack at α = 20° and the flap is either oscillating around the sy
 mmetrical plane at β = 0° or fixed at a deflection angle. The pitching o
 f the airfoil and the deflection of the flap can be individually controlle
 d in terms of mean angle\, oscillating amplitude\, frequency and initial p
 hase angle. Variations of the phase delay between the oscillations of the 
 main airfoil and the flap lead to the rotation\, expansion or contraction 
 of the lift curves undergoing dynamic stall. Quantitative evidences have b
 een extracted from the PIV data to help elucidate the significantly modifi
 ed aerodynamic characteristics of the pitching airfoil manipulated by an a
 ctive flap.
LOCATION:MED 2 2423 https://plan.epfl.ch/?room==MED%202%202423
STATUS:CONFIRMED
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