In order to study the effect of tab on film cooling
three equilateral triangular test tabs with different blockage ratio were designed
and their effects on heat transfer characteristics of film cooling were experimentally studied.The test results show that the efficiency of film cooling with tab is better than that without tab.The efficiency of film cooling will be increased with the increase in blow ratio
and it has a highest value in the direction of flow.When the blow ratio
the cooling efficiency will be increased with the increase in blow ratio;but when the blow ratio
the cooling efficiency will be decreased with the increase in blow ratio.