Abstract
It has been focused on the study of fluid mechanics at the low Reynolds number (about (10)^2<Re<(10)^4), which is animal flight area. It is necessary to examine the aerodynamic characteristics of the wing to clarify what kind of wing shape is suitable for the flight at this region. Thus, we planed to survey the wake flow field produced by the wing section of NACA0012 when the angle of attack changes suddenly using hot-wire anemometer at Reynolds number of 1000. Moreover, we drew some diagrams of instantaneous velocity in the wake of wing since the angle of attack has changed impulsively. As a result, we found that the wake is rocked periodically by upwash and downwash.
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