抄録
Wall temperature and velocity of a stagnation region of a plane impinging jet were measured by using thermochromic liquid crystal (TLC) and PIV. The plane jet was excited in time and space by adding suction / blowing type disturbances produced by servomotor-driven injectors. Surface temperature distribution showed unsteady streaks in parallel to a wall jet direction. The lowest spatial-averaged-wall temperature and vorticity intensity on the wall could be realized when the phase angle of the adjacent disturbance-wave train was φ=π, in which chain-link-fence structures were expected to be formed in the free-jet region upstream of the stagnation region.
