Abstract
A numerical study of the interaction between a wall jet and the swirling turbulent flow has been conducted in an axisymmetric dump combustor. The streams are considered to be isothermal. The necessary conditions for the formation of a wall film from the injected jet are analyzed. It is observed that the wall film can be formed more readily (i.e., with less injected air mass) when the slot is located at the corner and on the peripheral wall rather than on the wall of the inlet plane. A higher rate of injection is required to establish the film over the complete wall when the inlet swirl number is higher. Tangential velocity in the wall jet is found to reduce the ability to form a continuous wall film. The injected jet reduces the size of the central recirculation zone, which is even more prominent when the wall film is completely formed by thwarting the corner recirculation in the dump combustor.
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