二次元乱流境界層に吹出した壁面噴流の受動的制御 : 吹出し孔に取付けた三角タブの効果(<小特集>乱流せん断流の制御)  [in Japanese] Passive Control of Wall Jet Injected into a Two-Dimensional Turbulent Boundary Layer : Effects of a Delta Tab Attached to the Exit of an Injection Hole  [in Japanese]

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.