We undertake a numerical three dimensional study of the interaction of a row of discrete jets in a wall with a
transversal compressible flow for different injection rate (M=0.3, 0.5, 0.7 and 1.4). This simulation is applied to
the stator blade o f the CFM56 engine and is performed using the computational fluid dynamics (CFD)
simulation tool, with CFX .13 software. Reynolds averaged Navier Stokes equations were solved using a finite
volume method. Turbulence closure was achieved using the Shear Stre ss Transport model (SST). The velocity
and temperature distributions and the film cooling effectiveness are presented and discussed. W e found that the
best cooling effectiveness occurs at M= 0.7 . More, for higher injection rate (M=1.4), the results show th e
existence of two counter rotating vortices . These vortices transport the hot gas in the jet and thus degrade the
protective wall.