High resolution simulation of film cooling with blowing ratio and inclination angle effects based on hybrid thermal lattice Boltzmann method

A series of high resolution simulations on film cooling with varying blowing ratios and inclination angles are carried out by using in-house code based hybrid thermal lattice Boltzmann method. Three ranging from 0.2-0.8 four 15? to 60? chosen for the simulations. The evolutionary mechanism coherent structure in three domains film-covering region is studied view space time. Besides, influencing ratio angle flow heat transfer features uncovered. Results show that hairpin vortex, packet, quasi-streamwise vortex appearing rotating domain play a key role process cooling. strong ejection, sweep rotation resulted these vortices enhance convective transfer. It also found size varies significantly its integral form shows dependence angle. Moreover, coolant jet has significant impact turbulence fluctuation intensity. influence attachment film-cooling performance more obvious than believed all related closely variation streamwise wall-normal velocity case various angles.