抄録
We describe the effects of a delta tab attached to the exit of an injection hole for passive control of a wall jet. Streamwise and lateral injections of the wall jet into a two dimensional turbulent boundary layer are made. The mass flux ratio of the wall jet to the main stream is set at 0.5 and 1.2. An encapsulated temperature-sensitive liquid crystal is used to measure the temperature distribution on the surface. Time-averaged velocity is measured using a conventional hot-wire anemometer. Upstream tab with streamwise injection prevents the primary stream from convoluting in the downstream region. Upstream tab with lateral injection increases the width of the high-temperature region in the spanwise direction.
