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2013 年 10 月 03 日
Seminar - Synthetic Jet – Its Modeling, Testing, and Application in Active Flow Control by Dr. Hui TANG

Date:   03 October 2013 (Thursday)

Time:   4:00 pm - 5:00 pm

Venue:  EF305, The Hong Kong Polytechnic University

Abstract:

Synthetic jet (SJ) is a promising active-flow-control method in a wide range of aeronautical applications such as flow separation control, mixing control, and turbulence control. It consists of a succession of vortex structures that are produced through an orifice by the oscillation of a diaphragm. While keeping zero net mass flux, it is capable of transferring momentum and vorticity to ambient flows. Its actuator, synthetic jet actuator (SJA), can be made very compact and is easy to array for large-scale applications. In this talk, I will introduce the modeling of SJs and SJAs, including CFD simulations and low dimensional modeling, which can help the design and selection of SJAs. The experimental investigations on single SJs as well as SJ arrays in quiescent and boundary layer flows will also be presented, in which the flow structures responsible for flow separation control are addressed. In addition, I will introduce a newly designed SJA array and demonstrate its control effectiveness on a low-speed wing model.

Biosketch:

Dr Hui Tang is an Assistant Professor of Aerospace Engineering in the School of Mechanical & Aerospace Engineering, Nanyang Technological University (NTU), Singapore. He received his PhD degree in Aeronautical Engineering from the University of Manchester. Prior to joining NTU, he worked as a post-doctoral research fellow in the Department of Naval Architecture and Marine Engineering at the University of Michigan, Ann Arbor. His research interests are in active flow control, flapping wing aerodynamics, fluid-structure interaction, multiphase flow, and flight mechanics.