Injector tip cooling using fuel as the coolant

Details Injector tip cooling using fuel as the coolant Injector tip cooling using fuel as the coolant

1993-08-16

1995-03-28

Merritt, Karen B.

Fluid sprinkling, spraying, and diffusing

With heating or cooling means for the system or system fluid

In terminal element

239405, F23R 328

Patent

active

054009685

ABSTRACT:
Past systems have attempted to cool the combustor end or tip of fuel injection nozzles by dumping the spent cooling air directly into combustion zone where it can adversely affect the combustion process in general, and NOx and CO emissions in particular. The present system or structure for cooling a combustor end or tip uses a circulating device which in this application is an annular groove positioned in the tip through which fuel is circulated and absorbs heat directly from the tip and indirectly from the combusting gases being produced in the combustion zone. After cooling the tip the fuel exits into a mixing chamber. The mixture of fuel and combustion air is then introduced into the combustion zone, thus, avoiding the direct injection of fuel into the combustion zone. The fuel enters an inlet opening and exits an outlet opening which are positioned about 180 degrees one from the other.

REFERENCES:
patent: 1875457 (1932-09-01), Hemmingsen
patent: 2286658 (1942-06-01), Voit
patent: 4088437 (1978-05-01), Holzapfel
patent: 5121608 (1992-06-01), Willis et al.
patent: 5218824 (1993-06-01), Cederwall et al.

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