An annular wall which transversely connects longitudinal walls of an annular combustion chamber of a turbine engine is disclosed. The wall is essentially flat, inclined in relation to a longitudinal axis of the turbine engine, and includes a plurality of deflectors, each formed by an essentially rectangular flat sheet. The deflectors are mounted on the wall and each includes an aperture for the installation of a fuel injection system, a plurality of multi-perforation holes formed in relation to the deflectors around their aperture so as to allow a passage of air intended for the cooling of the deflectors, and a flow forcing unit which forces the flow of air for cooling the deflectors to flow radially around the fuel injection systems.