Alliedsignal Inc.

Honeywell International Inc.

Kyle A Lawrence

James E Lenertz

James Lolnell Hadder

Disclosed is a premix injector for mixing air and fuel and injecting the mixture into a combustion chamber. The premix injector includes an air blast fuel nozzle, a venturi, and a premix chamber. The venturi extends from an inlet to an exit which is in fluid communication with a combustion chamber. Importantly, the venturi has a jet deflector along its interior wall near its exit and on the side of the venturi nearest the exit of the combustor.

Combustor with dilution bypass system and venturi jet deflector

An injection tube for connecting a plenum to a combustion chamber includes a first mouth having a longitudinal axis and adapted for insertion into a cold plenum port or other component and a second mouth having a longitudinal axis and adapted for insertion into a hot chamber port or other component. To accommodate flexural, axial and torsional forces caused by differential thermal expansion between the two components, the mouths of the tube are configured to have multiple degrees of freedom within each corresponding port while maintaining port-mouth seal integrity. In an illustrative embodiment, the first mouth outer surface shape allows free slip of the first mouth parallel to the first mouth longitudinal axis, as well as rotation of the first mouth about both the first mouth longitudinal axis and a first mouth outer surface transverse axis. Mounted on the outer surface of the tube is a rocker arm adapted to engage a pivot mounted on the chamber outer surface or to engage the chamber outer surface itself. The rocker engagement allows rotation of the second mouth about a second mouth transverse axis while constraining axial movement of the tube, thereby preventing the second mouth from disengaging the chamber port.

Injection tube for connecting a cold plenum to a hot chamber

The present invention provides a valve and a low pressure drop combustor bypass. The valve simultaneously controls both the supply of air to the premixer and the amount of air directed into a large bypass duct. Air entering the bypass duct is reintroduced into the gas flowpath as dilution air downstream of the combustion zone. At low power settings the valve directs most of the air to the bypass duct, in effect bypassing the fixed area dilution ports, whereby the pressure drop across the combustor may be controlled at an optimal level.

Combustor dilution bypass method

The present invention provides a valve and a low pressure drop combustor bypass. The valve simultaneously controls both the supply of air to the premixer, and the amount of air directed into a large bypass duct. Air entering the bypass duct is reintroduced into the gas flowpath as dilution air downstream of the combustion zone. At low power settings the valve directs most of the air to the bypass duct, in effect bypassing the fixed area dilution ports, whereby the pressure drop across the combustor may be controlled at an optimal level.

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Chandler, AZ, United States of America

Kyle A Lawrence