GPU-Accelerated Wall-Modeled Large-Eddy Simulations of Shaped Film Cooling Holes

Advanced gas turbine engines rely heavily on efficient cooling strategies to protect the components within the hot sections experiencing extreme thermal loads. Among the promising designs, the 7-7-7 shaped film cooling hole has demonstrated improved cooling performance through enhanced jet attachment and lateral coverage. The present study utilizes high-fidelity computational fluid dynamics to investigate the thermal and fluid dynamic behavior of the 7-7-7 film cooling hole under varying boundary layer conditions and blowing ratios. Simulations are conducted using Cadence Fidelity(TM) Charles solver with GPU acceleration, utilizing wall-modeled large-eddy simulation techniques. The investigation spans laminar and turbulent boundary layer regimes, exploring density ratio and blowing ratio effects on film cooling effectiveness and jet-mainstream interactions. The results aim to inform optimal cooling strategies through in-depth analysis of the near-wall vortex dynamics and scalar transport characteristics associated with shaped-hole designs. Finally, we also investigate the effects of density ratio between coolant and the main flow for a real engine with a combustor liner cooling system.