可視化によるピッチング翼まわりの出発流の解析 : 第1報,弦中央をピッチング軸とするだ円翼の場合

概要

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The starting flows past an elliptic airfoil pitching at large incidences are examined by visualization experiments and numerical calculations. The study concerns two-dimensional incompressible cases where the chordal Reynolds number is between 10^3 and 10^4. The main object of the research is to reveal some fundamental phenomena specific to the unsteady airfoils in the so-called deep stall regime. The variable parameters considered are the pitching frequency, the mean incidence, the angular amplitude and the Reynolds number, of which the effects on the wake patterns will be discussed. It will be demonstrated in due course that the vortex formation, consequent to the pitching motion of the airfoil, is subject to two types of different fluid dynamics, which are dependent on the relative importance of the reduced frequency and the angular amplitude.
社団法人日本機械学会の論文
1989-09-25