Abstract
We investigate the wake flow field produced by NACA0012 wing section using hot-wire anemometer at low Reynolds number, and compare the mean velocity profiles at chord Reynolds number 1000 to those at chord Reynolds number of 2000. The discontinuous point appears in the mean velocity profiles of cross-flow direction at high angle of attack at chord Reynolds number of 1000,but it does not appear at chord Reynolds number of 2000. This is because the leading-edge separation occurs. Moreover, we measure the fluctuation velocity profiles and the vortex shedding phenomena. As a result, we found that the fluctuation velocity is composed of the relatively high amplitude and low-frequency components, and Roshko numbers are almost the same as that of the circular cylinder at an appropriate Reynolds number regime.
