Conference Paper 翼周り剥離流れ制御におけるシンセティックジェット駆動周波数と流れの不安定周波数の比較
Flow instability and actuation frequency of a synthetic jet for separated flow control

阿部, 圭晃  ,  野々村, 拓  ,  藤井, 孝藏  ,  Abe, Yoshiaki  ,  Nonomura, Taku  ,  Fujii, Kozo

The large-eddy simulation (LES) of separation control using a synthetic jet is conducted around an NACA0015 airfoil of the chord Reynolds number 63,000. The linear stability analysis is together conducted to detect the unstable mode of the wall-normal fluctuation in the separation controlled flows. In the highly controlled cases, the harmonic modes of the input frequency directly enhances the KH instability modes which linearly develop in the separated shear layer. The other modes of both the higher and lower frequencies grow following the most unstable modes (the nonlinear growth regime), which effectively promotes the turbulent transition and the generation of large vortex structures.
会議情報: 第47回流体力学講演会/第33回航空宇宙数値シミュレーション技術シンポジウム (2015年7月2日-3日. 東京大学生産技術研究所), 目黒区, 東京
形態: カラー図版あり
Meeting Information: 47th Fluid Dynamics Conference /the 33rd Aerospace Numerical Simulation Symposium (July 2-3, 2015. Institute of Industrial Science , the University of Tokyo), Meguro, Tokyo, Japan
Physical characteristics: Original contains color illustrations

Number of accesses :  

Other information