Compressible Large Eddy Simulation of a Film Cooled Stage One Nozzle at Different Freestream Turbulence Levels

Gregory Michael Laskowski, General Electric

Usage Details

Gregory Michael Laskowski, Gustavo Ledezma, James Kopriva, Zhi Jian Wang, Chaitanya Talnikar, Rathakrishnan Bhaskaran, Lawrence Cheung, Qiqi Wang, Chaitanya Ghodke

Gas turbines are the backbone of aircraft propulsion. Therefore, technologies that improve the fuel efficiency of these turbines can have a significant impact on the U.S. economy and can substantially reduce polluting emissions. The quest for greater turbine efficiency has led to increased firing temperatures, subjecting turbine components to extremely high temperatures. One common technique for abating these temperatures is film cooling, which bleeds cool air from the compressor stage of the engine and discharges it through small holes in the turbine blade walls, providing an insulating layer of cool air. The focus of this project is to investigate the impact of freestream turbulence on film cooling, including mixing, turbulence decay, and boundary layer development.