B-4 ねじり振動する翼まわり流れの動的剥離特性について : 渦法による数値シミュレーション例(空力I,一般講演)

概要

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When an airfoil oscillates in pitching motion in the uniform flow near the stall angle of attack, the flow state around the airfoil is classified into four kinds of flow states according to a mean angle of attack and a vibration frequency. This research is aiming at the phenomenon that the separated flow around an oscillating airfoil changes abruptly to the attacked flow state when the vibration frequency increases. In order to clarify the relation between the airfoil vibration frequency and the behavior of separated shear layer, a numerical simulation of a flow around an oscillating airfoil near stall angle of attack was carried out by a vortex method for some angles of attack and vibration frequencies. This paper shows some examples of calculated results.
社団法人日本ガスタービン学会の論文
2004-10-01