Experimental Study of Passive Jet Flow Control of Chamfered Square Cylinder
Publication: Journal of Aerospace Engineering
Volume 37, Issue 2
Abstract
This study conducted wind tunnel tests to verify a passive jet flow control method for suppressing the aerodynamic force on a chamfered square cylinder at a moderate Reynolds number, focusing on the influence of the opening parameters and the spanwise spacing ratio of hollow pipes on the jet flow control effect. The pressure coefficient distribution on the surface of the cylinder and the overall aerodynamic coefficient were considered in order to systematically analyze the influence of opening shape, opening number, opening height, pipe height, and pipe radial thickness, and to determine the optimal combination of opening parameters. Subsequently, we analyzed the influence of the spanwise spacing ratio on passive jet flow control. Furthermore, the optimal arrangement of the hollow pipe was derived by comparing the aerodynamic coefficients of uncontrolled and controlled cylinders. The results revealed that the passive jet hollow pipe significantly reduces the root mean-square value of the pressure coefficient and the fluctuation of the lift coefficient. Moreover, the platform area of the mean pressure coefficient at the leeward side of the cylinder increases and the mean drag coefficient decreases. The spectrum analysis results showed that the passive jet flow control pipe alters the frequency and intensity of vortex shedding in the wake region. All results indicated that the aerodynamic forces and wakes of a chamfered square cylinder are effectively controlled through jet flow control with perforated hollow pipes.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research is supported by the National Key Research and Development Program of China (2021YFC3100702), the National Natural Sciences Foundation of China (NSFC) (52078175, 51778199), the Natural Science Foundation of Guangdong Province (2019A1515012205), the fundamental research funds of Shenzhen Science and Technology plan (JCYJ20190806144009332), the Shenzhen Science and Technology Program (KQTD20210811090112003), and the Stability Support Program for colleges and universities in Shenzhen (GXWD20201230155427003-20200823134428001).
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Published In
Journal of Aerospace Engineering
Volume 37 • Issue 2 • March 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Dec 2, 2022
Accepted: Sep 21, 2023
Published online: Nov 27, 2023
Published in print: Mar 1, 2024
Discussion open until: Apr 27, 2024
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