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The experimental study has been performed on turbulent channel flow with injection through an inclined slit. The inclined angle is changed 30°, 60° and 90° at the main stream velocity 10m/s. The dimensionless injection flow rate is varied three steps in ranging 0.067∿0.200. The cooling effectiveness, wall static pressure are measured behind the slit. The cooling effectiveness increases with increasing the dimensionless injection flow rate. When the inclined angle is 30°, the effect of injection remains over long distance in the near-wall region, and the highest performance is obtained.
