Unsteady transonic flow control around an airfoil in a channel |
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| Authors: | Md Abdul Hamid A B M Toufique Hasan Mohammad Ali Yuichi Mitsutake Toshiaki Setoguchi Shen Yu |
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| Affiliation: | 1. Department of Mechanical Engineering, Bangladesh University of Engineering and Technology(BUET), Dhaka-1000, Bangladesh;2. Institute of Ocean Energy, Saga University, Saga 840-8502, Japan;3. Institute of Engineering Thermophysics, Chinese Academy of Science, P.O.Box 2706, Beijing 100080, China |
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| Abstract: | Transonic internal flow around an airfoil is associated with self-excited unsteady shock wave oscillation. This unsteady phenomenon generates buffet, high speed impulsive noise, non-synchronous vibration, high cycle fatigue failure and so on. Present study investigates the effectiveness of perforated cavity to control this unsteady flow field. The cavity has been incorporated on the airfoil surface. The degree of perforation of the cavity is kept constant as 30%. However, the number of openings (perforation) at the cavity upper wall has been varied. Results showed that this passive control reduces the strength of shock wave compared to that of baseline airfoil. As a result, the intensity of shock wave/boundary layer interaction and the root mean square (RMS) of pressure oscillation around the airfoil have been reduced with the control method. |
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| Keywords: | transonic flow passive control shock wave oscillation |
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