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SUMMARY:Recent developments in plasma aerodynamics - Professor Kwing So Ch
 oi\, University of Nottingham
DTSTART:20170217T130000Z
DTEND:20170217T140000Z
UID:TALK70383@talks.cam.ac.uk
CONTACT:Akshath Sharma
DESCRIPTION:Dielectric-barrier-discharge (DBD) plasma actuators are unique
 . They are all electric devices without moving parts (i.e. no valves\, dia
 phragms\, cylinders or gears). DBD plasma actuators are therefore light an
 d fast-responding\, which can be easily integrated into air and land vehic
 les for flow control. One of recent developments in DBD plasma actuators i
 s to use them as virtual actuators for flow separation control\, replacing
  control surfaces of aircraft\, such as vortex generators\, flaps and slat
 s. For example\, drag penalty associated with mechanical vortex generators
  can be avoided by using DBD plasma vortex generators on demand\, i.e. onl
 y when they are required during take-off and landing. Virtual Gurney flaps
  based on DBD plasma actuators can be attached at the trailing edge of an 
 aerofoil. Plasma-wall jet issued against the flow creates a local stagnati
 on region with high pressure on the pressure surface\, enhancing lift when
  virtual Gurney flaps are activated. Virtual plasma slats can be configure
 d using symmetric DBD plasma actuators. Spanwise vortices are created when
  the wall-normal plasma jet is issued against the freestream\, helping pre
 vent leading-edge flow separation to give a stall delay at high angles of 
 attack. Recent developments of these and some other plasma actuators will 
 be discussed in the context of drag reduction and flow control.
LOCATION:JDB Seminar Room\, CUED
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