The interaction between the latticework duct and film cooling on the thermal performance with different film cooling hole locations

This paper numerically explored the influence of the film cooling hole locations and blowing ratios on the thermal performance both in the latticework duct and film cooling. The Realizable k−ε turbulence model and polyhedral mesh were utilized to conduct this study. The film cooling hole was successively installed from the jet region to turning region for different cases. The blowing ratio included 0.2, 0.8, 1.0 and 1.25. These results suggested that the different film hole locations could induce the different flow and cooling performance both in the latticework duct and film cooling channel. The film cooling hole destroyed the boundary layer and was conducive to heat exchange enhancement in the latticework duct. The film cooling hole configured near the turning region had more remarkably effect on the thermal performance. The different location means the different inlet condition for the film cooling. Maximum value of film cooling effectiveness was reached as the film cooling hole installed near the jet region because of the small counter-rotating vortex.