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Abstract
This paper describes the effects of a delta-tab on the film cooling effectiveness. The wall-jet is injected streamwisely and laterally into a two-dimensional turbulent boundary layer. A small delta-tab is installed at the edge of the injection hole exit. The mass flux ratio of the wall-jet to the main stream is set at 0.5,0.85 and 1.2 in streamwise injection, and at 0.5 and 1.2 in lateral injection. An encapsulated temperature-sensitive liquid crystal is used to measure the temperature distribution on the surface. Upstream-tab in streamwise injection prevents the primary stream from convoluting in the downstream region. The total cooling effectiveness in streamwise injection with a upstream-tab is larger than that in the spanwise injection at downstream.
Journal
- Journal of the Gas Turbine Society of Japan [Journal Detail]
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日本ガスタービン学会誌 24(95) pp.66-73 19961210 [Index]
Gas Turbine Society of Japan