While the wall heat flux reaches a maximum in the throat of the combustion chamber, the peculiarities of the injector head should be negligible there and further downstream in the divergent nozzle. (The flow in a “good” combustion chamber should be already uniform upstream the throat.) The particularities of the porous injector head should come out at the first 100 mm from the injector plate. At this location the parameters of the flow depend strongly on the injection conditions. The flow and the heat fluxes in a combustion chamber with coaxial injectors were studied by many other researchers, e.g., in the extensive series of works from ASTRIUM (now Airbus D&S) [6–8]. However, the flame of porous injector head requires the numerical analysis.