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MMAE Seminar - Dr. Jinjun Wang - DBD Plasma Flow Control Mechanism and Some Applications

Event Date 

March 30, 2017 - 12:45pm to 1:45pm

Location 

John T. Rettaliata Engineering Center
Room 104
10 West 32nd Street
Chicago, IL 60616

Description 

Armour College of Engineering's Mechanical, Materials & Aerospace Engineering Department will welcome Dr. Jinjun Wang, Director of Institute of Fluid Mechanics at Beijing University of Aeronautics and Astronautics (BUAA) and Director of Fluid Mechanics Key Laboratory of Ministry of Education of China, on Thursday, March 30th, to present his lecture, DBD Plasma Flow Control Mechanism and Some Applications.

Abstract

Dielectric-barrier-discharge (DBD) plasma actuators are all-electric devices without the need of pneumatics, hydraulics or moving parts. They are light and fast reacting, ideal for active control of flow over aerodynamic bodies. Moreover, DBD plasma actuators are very thin, which can be either attached on or integrated into the aerodynamic body. DBD plasma actuators are designed to produce glow discharge plasma on one side (asymmetric actuator) or both sides of the exposed electrode (symmetric actuator), with either an offset or continuous lower electrode. These actuators are usually excited with ac voltage to allow continuous plasma generation (albeit intermittently throughout the ac cycle). Momentum is transferred from the plasma discharge to the ambient air through a collision of ions, which results in a net body force transmitted to the air flow. This accelerates the air and induces a flow away from the exposed electrode. DBD plasma actuators are therefore simple, yet very powerful devices that make novel aerodynamic applications possible. In this presentation, Plasma Gurney flap, vortex generator, synthetic jet, circulation control et al will be introduced, and the wide applications of DBD plasma actuators in aeronautical engineering are expected.

Biography

Professor Jin-Jun Wang is the Director of Institute of Fluid Mechanics at Beijing University of Aeronautics and Astronautics (BUAA) and the Director of Fluid Mechanics Key Laboratory, Ministry of Education of China. He was the head of Department of Aircraft Design and Applied Mechanics (1997-2003) in BUAA. He is the recipient of National Science Foundation for The National Science Fund for Distinguished Young Scholars (2004) and the Yangtze River Scholar Award (Distinguished Professor) in 2009. He is also the associate editor of Journal of Aircraft, Journal of Experimental Mechanics, and Theoretical and Applied Mechanics Letters, and one of the editorial board members of Experiments in Fluids, ACTA MECHANICA SINICA and Chinese Journal of Aeronautics. He has been the member of International Steering Committee for 7 international symposiums. He was the Chairman of 4th International Conference on Experimental Fluid Mechanics in 2014. He has published more than 100 papers in international journals in flow control, turbulence, aircraft aerodynamics, including Journal of Fluid Mechanics, Physics of Fluids, Progress in Aerospace Sciences, AIAA Journal and Experiments in Fluids.

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