Water injection for gas turbine engine emission control

F - Mech Eng,Light,Heat,Weapons – 02 – C

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60/178, 60/179

F02C 7/22 (2006.01)

Patent

CA 1126520

Abstract Simplified apparatus is provided ? separate pipe flows of fuel and water prior to delivery to the combustor of a gas turbine engine to reduce the temperature to which pressurized air is heated by the combustion of fuel, thereby reducing nitrous o?ide emissions in the products of combustion. The separate pipe flows of fuel and water are combined in a simple T-section wherein the two flows are generally normal at their point of confluence within the T-section to produce turbulent mixing therein. It has been discovered that the mixture of fuel and water transforms into a homogeneous cream at water-to- fuel ratios slightly in excess of 0.7 for diesel fuel No. 2, and that the rate of separation is greatly reduced, thereby minimizing the var?ance in the percen- tage of fuel within the mixture between a plurality of nozzles fed from a common fuel manifold receiving the mixture.

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