Abstract
The relationship of how acoustically augmented air-jet mixing can help in the reduction of gas turbine combustor NO{sub x} emissions was examined. NO{sub x} emissions from gas turbines have become a major environmental concern resulting in smog and acid rain at ground level. NO{sub x} emissions from subsonic jet engines and stationary gas turbines also lead to the formation of ozone in the troposphere, exposure to which can result in major health problems. Acceptable gas turbine combustor performance depends on good air-jet mixing. Good mixing has shown to produce high burning rates, efficient combustion and minimum soot and nitric oxide formation in the primary zone. In the dilution zone, good mixing of dilution-air and combustion products is crucial for an acceptable temperature pattern quality at the combustor exit. Acoustically excited jets provide better mixing properties over steady jets. Tests were performed to acoustically drive a gas turbine conventional small tubular combustor so that advantage could be taken of the acoustically augmented mixing processes for the reduction of NO{sub x}. The experiments assessed the effectiveness and control by the acoustic drive, at 1/8 load, by NO{sub x} profile measurements in the combustor primary zone exit plane, for fuel-lean to fuel-rich conditions.
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Citation Formats
Vermeulen, P J, and Ramesh, V.
Acoustically reduced gas turbine combustor NO{sub x}.
Canada: N. p.,
1998.
Web.
Vermeulen, P J, & Ramesh, V.
Acoustically reduced gas turbine combustor NO{sub x}.
Canada.
Vermeulen, P J, and Ramesh, V.
1998.
"Acoustically reduced gas turbine combustor NO{sub x}."
Canada.
@misc{etde_644925,
title = {Acoustically reduced gas turbine combustor NO{sub x}}
author = {Vermeulen, P J, and Ramesh, V}
abstractNote = {The relationship of how acoustically augmented air-jet mixing can help in the reduction of gas turbine combustor NO{sub x} emissions was examined. NO{sub x} emissions from gas turbines have become a major environmental concern resulting in smog and acid rain at ground level. NO{sub x} emissions from subsonic jet engines and stationary gas turbines also lead to the formation of ozone in the troposphere, exposure to which can result in major health problems. Acceptable gas turbine combustor performance depends on good air-jet mixing. Good mixing has shown to produce high burning rates, efficient combustion and minimum soot and nitric oxide formation in the primary zone. In the dilution zone, good mixing of dilution-air and combustion products is crucial for an acceptable temperature pattern quality at the combustor exit. Acoustically excited jets provide better mixing properties over steady jets. Tests were performed to acoustically drive a gas turbine conventional small tubular combustor so that advantage could be taken of the acoustically augmented mixing processes for the reduction of NO{sub x}. The experiments assessed the effectiveness and control by the acoustic drive, at 1/8 load, by NO{sub x} profile measurements in the combustor primary zone exit plane, for fuel-lean to fuel-rich conditions. The acoustic drivers were operated up to a maximum of 150 W each in order to safeguard the drivers. Under lean conditions at 227 Hz or 246 Hz, mean NO{sub x} was reduced suggesting that a value of 10 ppm (50 per cent) reduction is possible. Other tests at 180 Hz showed that even lower NO{sub x} under lean-conditions may be possible. Under rich-conditions at 246 Hz, mean NO{sub x} can be reduced by 23 per cent. This study has shown that it is possible to create a low NO{sub x} conventional combustor without complicated design changes to gas turbines. 18 figs., 2 tabs., 9 figs.}
place = {Canada}
year = {1998}
month = {Sep}
}
title = {Acoustically reduced gas turbine combustor NO{sub x}}
author = {Vermeulen, P J, and Ramesh, V}
abstractNote = {The relationship of how acoustically augmented air-jet mixing can help in the reduction of gas turbine combustor NO{sub x} emissions was examined. NO{sub x} emissions from gas turbines have become a major environmental concern resulting in smog and acid rain at ground level. NO{sub x} emissions from subsonic jet engines and stationary gas turbines also lead to the formation of ozone in the troposphere, exposure to which can result in major health problems. Acceptable gas turbine combustor performance depends on good air-jet mixing. Good mixing has shown to produce high burning rates, efficient combustion and minimum soot and nitric oxide formation in the primary zone. In the dilution zone, good mixing of dilution-air and combustion products is crucial for an acceptable temperature pattern quality at the combustor exit. Acoustically excited jets provide better mixing properties over steady jets. Tests were performed to acoustically drive a gas turbine conventional small tubular combustor so that advantage could be taken of the acoustically augmented mixing processes for the reduction of NO{sub x}. The experiments assessed the effectiveness and control by the acoustic drive, at 1/8 load, by NO{sub x} profile measurements in the combustor primary zone exit plane, for fuel-lean to fuel-rich conditions. The acoustic drivers were operated up to a maximum of 150 W each in order to safeguard the drivers. Under lean conditions at 227 Hz or 246 Hz, mean NO{sub x} was reduced suggesting that a value of 10 ppm (50 per cent) reduction is possible. Other tests at 180 Hz showed that even lower NO{sub x} under lean-conditions may be possible. Under rich-conditions at 246 Hz, mean NO{sub x} can be reduced by 23 per cent. This study has shown that it is possible to create a low NO{sub x} conventional combustor without complicated design changes to gas turbines. 18 figs., 2 tabs., 9 figs.}
place = {Canada}
year = {1998}
month = {Sep}
}