Large-eddy simulation of a jet in a crossflow

The flow field induced by the interaction between a single jet flow exhausting from a pipe and a turbulent flat plate boundary layer at a local Reynolds number of Re-infinity = 400, 000 is numerically studied using large-eddy simulation (LES). The ratio R of the jet velocity to the cross stream velocity is 0.1. The flow regime investigated corresponds to that of gas turbine blade film cooling. In order to provide the realistic time-dependent turbulent inflow information for the crossflow an LES of a spatially developing turbulent boundary layer is simultaneously performed using a rescaling method for compressible flow. The main flow features such as the separation area inside the pipe and the recirculation downstream of the jet exit are analyzed.