Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/92788
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Title: Flow control on a bluff body using dielectric barrier discharge plasma actuators
Authors: Chen, Z 
Shen, L
Wen, CY 
Issue Date: Jul-2019
Source: AIAA journal, July 2019, v. 57, no. 7, p. 2670-2674
Abstract: In this study, a traditional dielectric barrier discharge (DBD) plasma actuator and plasma streamwise vortex generators (PSVGs) are installed on a bluff body to control the wake fluctuations. Experiments are conducted in a wind tunnel with a chord Reynolds number of 5000. Particle image velocimetry and hot-wire measurements are used to obtain the details of the flowfields. The results show that both DBD and PSVG actuations clearly reduce the size of the recirculation bubble regions, and they significantly suppress the wake fluctuations. A comparison of the traditional DBD and PSVG cases shows that PSVGs have better control performance on the reduction of the recirculation bubble sizes and the Karman vortex shedding frequency in the wake at low speed. Specifically, the PSVGs have a strong three-dimensional effect on the entire flowfield and generate streamwise vorticities that interact with the shear flow over the bluff body. The local flow separations are thereby suppressed considerably. The induced streamwise vorticities are further entrained downstream by the ambient freestream, which consequently reduces the recirculation bubble behind the bluff body and suppresses the wake fluctuations. These results suggest that PSVGs are promising devices for conducting flow control in bluff body wakes at low speed.
Publisher: American Institute of Aeronautics and Astronautics
Journal: AIAA journal 
ISSN: 0001-1452
EISSN: 1533-385X
DOI: 10.2514/1.J058196
Rights: © 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
This is the peer reviewed version of the following article: Chen, Z., Shen, L., & Wen, C. Y. (2019). Flow control on a bluff body using dielectric barrier discharge plasma actuators. AIAA Journal, 57(7), 2670-2674 , which has been published in final form at https://doi.org/10.2514/1.J058196
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