Flow modifying device

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F - Mech Eng,Light,Heat,Weapons

02

C

60/113, 60/170

F02C 5/00 (2006.01)

Patent

CA 1208923

FLOW MODIFYING DEVICE ABSTRACT OF THE DISCLOSURE A swirler for a gas turbine engine combustor is disclosed for simultaneously controlling combustor flow rate, swirl angle, residence time and fuel-air ratio to provide three regimes of operation. A first regime is provided in which fuel-air ratio is less than stoichometric, NOx is produced at one level, and combustor flow rate is high. In a second regime, fuel-air ratio is nearly stoichometric, NOx production is less than that of the first regime, and combustor flow rate is low. In a third regime, used for example at lightoff, fuel-air ratio is greater than stoichometric and the combustor flow rate is less than in either of the other regimes.

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