Department of Aerospace Engineering (archive)

Aerospace Engineering Departmental Seminar Series: Professor Xueying Deng, Beijing University of Aeronautics and Astronautics: "The Wing Rock Motion Induced by Forebody Asymmetric Vortices and its Active Control"

Professor Xueying Deng

Prof. Xueying Deng
Professor and Vice Chairman of Academic Committee
Beijing University of Aeronautics and Astronautics
Beijing China

Tuesday, November 30, 2010
4:10 - 5:00 PM.
Room 1235 Howe Hall

The Wing Rock Motion Induced by Forebody Asymmetric Vortices and its Active Control

In order to make the maneuvers of advanced aircraft, it should be operated at high angles of attack. The wing rock motion phenomenon of the aircraft would usually occur at such conditions. The wing rock is characterized by a self-induced limit-cycle oscillatory motion, primarily in roll. The occurrence of the wing rock would impact the flight safety of the aircraft. In order to reveal the aerodynamic mechanism for the wing rock motion and effectively avoid its harm to aircraft, extensive studies have been carried out in recent years. It has been suggested that wing rock motion could be induced by the leading edge separated asymmetric vortices from slender delta wing. Our recent researches have revealed that the asymmetric vortices flows are very sensitive to the micro-perturbation on the nose-tip of advanced aircraft, and the wing-body rock induced by forebody asymmetric vortices is also dependent on nose perturbation closely.  We have demonstrated that effective control of rock motion patterns can be realized with different circumferential positions of nose tip perturbation.  In this talk, following fundamental questions will be addressed: whether the tip perturbation could control the wing-body rock motion effectively？How it will be implemented? What is the fundamental physical mechanism for the rock motion control?  

Brief Bio:  Prof. Xueying Deng is the Professor and Vice Chairman of Academic Committee of Beijing University of Aeronautics and Astronautics (BUAA), Beijing, P. R. China.  Prof. Deng was the Vice President of BUAA from 1994 to 2000.  Prof. Deng was a visiting scholar at Mechanical and Aerospace Engineering Department of Princeton University from 1979 to 1982.   His research interests include experimental aerodynamics, complex flows including separated flow; vortex flow; shock wave/boundary layer interaction, Asymmetric vortices flow; wing rock and its control.