Patent ID: 8096804

Claim:
Axisymmetrical device for controlling the temperature of a hot confined gas stream that is contained in an inside pipe ( 4 ) with a diameter Di that comprises: A cylindrical chamber ( 1 ) with a diameter De that surrounds the pipe with a diameter Di over a length L 1 , A convergent conical portion ( 2 ) with a length Lc that makes it possible to pass from the diameter De to diameter Ds that is strictly smaller than De, A cylindrical pipe ( 3 ) with a diameter Ds that extends over a length L 2 , At least one intake pipe ( 5 ) of a coolant with a diameter Dc that is located perpendicular to the section of the device and that makes it possible to feed coolant to an annular portion ( 6 ) that is between the outside cylindrical chamber ( 1 ) and the inside pipe ( 4 ), whereby the device adheres to the following proportions: L 1 /Di between 0.5 and 2 Lc/Di between 0.5 and 5 L 2 /Di between 1.5 and 10 Dc/Di between 0.1 and 0.4 De/Di between 1 and 5.