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UID:0-313@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20191204T163000

DTEND;TZID=Asia/Jerusalem:20191204T173000

DTSTAMP:20230527T131802Z

URL:https://aerospace.technion.ac.il/events/cathodic-arc-plasma-actuator-f
 or-flow-manipulation/

SUMMARY:Cathodic Arc Plasma Actuator for Flow Manipulation
DESCRIPTION:Lecturer:Anton Ronis\n Faculty:Department of Aerospace Engineer
 ing\n Institute:Technion – Israel Institute of Technology\n Location:Cla
 ssroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract: 
 \n Details: \n Flow separation is an important phenomenon to consider when
  designing airplane wings\, stabilizers\, and other fluid dynamics applica
 tions such as ground vehicles and internal diffuser flows. When unattended
  flow separation can lead to increase in drag\, stall and energy losses\, 
 up to a loss of controlled flight. It is therefore desirable to have actua
 tors and associated control techniques that can mitigate this phenomenon\,
  a research domain collectively known as flow control.\nIn this work we ch
 aracterize the performance of a novel plasma actuator\, termed as the cath
 odic arc actuator (CAA). The CAA operates by igniting a cathodic-arc disch
 arge between two closely spaced flush electrodes. The discharge time evolu
 tion was experimentally characterized using several techniques including: 
 fast photography\, spectroscopy\, particle image velocimetry (PIV)\, as we
 ll as direct measurement of thrust. In the first part of the talk we prese
 nt a time dependent 0-D thrust model of the CAA interaction with ambient a
 ir. The model is shown to be in excellent agreement with measurement resul
 ts.\nIn the second part of the talk we present results from a flow control
  experiment\, where the CAA is embedded in an aerodynamic model and operat
 ed inside a low speed wind tunnel. Hot wire anemometry and optical-oil bas
 ed techniques were used to measure the influence of actuator operation on 
 the flow. A procedure for selecting aerodynamic model parameters for such 
 experiments will be discussed as well.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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