Effect of Synthetic Jet on NACA۰۰۱۲ Airfoil Vortex Structure and Aerodynamic Characteristics
Publish place: Journal of Applied Fluid Mechanics، Vol: 17، Issue: 5
Publish Year: 1403
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-17-5_010
تاریخ نمایه سازی: 7 اسفند 1402
Abstract:
In this manuscript, the vortex generated by the main frequency excitation of the shedding vortex at various attack angles is investigated by employing the synthetic jet control technique. We also analyzed the impact of the vortex structure on the fled flow around the wing and the spectral characteristics corresponding to the vortex. The dominant frequency and harmonic frequency corresponding to the wave rule of the shedding vortex at various attack angles without the absence of a synthetic jet are selected as the synthetic jet excitation frequency. The results indicate that under the excitation of fixed frequency synthetic jet, the shape of the shedding vortex in the flow field turns correspondingly. Compared with the flow field without jet excitation, it is found that the field with the jet at most attack angles is stable in ۲S (Single) mode, and the flow field at a small attack angle is stable in a chaotic state. The angle of attack with a chaotic state is delayed by adding a jet, which makes the curves and corresponding spectral characteristics more orderly. At a defined attack angle, the combined frequency synthetic jet will cause the lift coefficient to fluctuate regularly. At this time, the multiple small-scale vortex structures lead to lift reduction.
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Authors
J. Wang
School of Environment and Safety Engineering, North University of China, Taiyuan, Shanxi, ۰۳۰۰۵۱ China
X. Shi
School of Environment and Safety Engineering, North University of China, Taiyuan, Shanxi, ۰۳۰۰۵۱ China
Q. Zhang
College of Mechatronic Engineering, North University of China, Taiyuan, Shanxi, ۰۳۰۰۵۱, China
J. Chang
College of Mechatronic Engineering, North University of China, Taiyuan, Shanxi, ۰۳۰۰۵۱, China
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