Abstract: A system is provided for cooling especially the backplate of a flame tube of a combustion chamber for gas turbine engines, of the type having at least one burner arranged on the backplate and having a fuel nozzle and at least one swirler arranged coaxially with the fuel nozzle for the supply of combustion air. The backplate is cooled with compressed air diverted from a compressor and ducted to a head end of the combustion chamber. The backplate forms at least one cooling air duct to carry the compressed air supplied for backplate cooling, and the cooling air duct communicates at its outlet end at the burner with the flame tube such that the compressed air issuing from the cooling air duct enters into combustion in the primary zone. At its outlet end the cooling air duct can communicate with the air inlets of at least one swirler.

Abstract: A temperature measuring probe which includes thermo-wires extending between bead-like temperature sensors and a coupling device which connects the probe to indicating or control equipment. A terminal member is provided at one end of the probe body with an arc-shaped transition member being provided between the probe body and the terminal member. The transition member has a substantially round cross-sectional configuration with the terminal member having a shallow rectangular cross-sectional configuration so that a substantially laminar flow of coolant through the probe body is achieved.