Shock tube evaluation on C2H4 ignition delay differences among N2, Ar, He, CO2 diluent gases

Xiong, Xiaohe; Lv, Zhaomin; Tan, Houzhang; Peng, Zhimin; Ding, Yao

doi:10.1016/j.joei.2019.11.010

Cited by 14 publications

(3 citation statements)

References 27 publications

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“…Besides, the injection oxidant atmosphere changes the heat release rate and specific heat capacity of the flame. The ignition delays and chemical kinetics will be adjusted with different dilution gases [25][26][27]. The flame sensitivity and pollutant formation pathways under different dilution mediums cannot be ignored [28][29].…”

Section: Introductionmentioning

confidence: 99%

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Effects of oxy jet in cross-flow on the combustion instability and NOx emissions in lean premixed flame

Tao

Zhou

2022

THERM SCI

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Combustion instability and nitrogen oxides emission are crucial factors for modern gas turbine combustors, which seriously hampers the research and development of advanced combustors. To eliminate combustion instability and NOx emissions simultaneously, effects of the ?Oxy? (CO2/O2, N2/O2, Ar/O2and He/O2) jet in cross flow(JICF)on combustion instability and NOx emissions are experimentally studied. In this research, the flow rate and oxygen ratio of the combustor are varied to evaluate the control effectiveness. Results denotes that all the four oxy fuel gas: CO2/O2, N2/O2, Ar/O2and He/O2, could suppress combustion instability and NOx emissions. The CO2/O2dilution can achieve a better damping results than the other three cases. There are peak values or lowest points of sound pressure amplitude as the parameter of ?Oxy? JICF changes. Mode transition appears in both acoustic signal and CH* chemiluminescence of the flame. But the turning point of mode transition is different. Under the CO2/O2cases, the NOx emission decreases from 22.3ppm to 15.2ppm, the damping ratio of NOxis 40.39%. The flame shape and length were changed under different JICF dilutions. This research could promote the application of jet in cross flow methods on combustion instability or pollutant emissions in gas turbines.

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Section: Introductionmentioning

confidence: 99%

“…The oxygen ratio of the dilution oxidant will exert impact on flame heat release rate and burning velocities [36]. Currently, although there are some literatures that studies the effects of carbon dioxide (CO 2 ), nitrogen (N 2 ), helium (He) and argon (Ar) on the combustion reaction process [23][24][25][26][27][28][29][30][31]…”

Section: Introductionmentioning

confidence: 99%

Effects of oxy jet in cross-flow on the combustion instability and NOx emissions in lean premixed flame

Tao

Zhou

2022

THERM SCI

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“…At the same time, with the application of JICF, the local flame temperature field will be changed, 23,24 and the flame residence time in the combustion chamber will be shortened, which is essential for the formation of thermal nitrogen oxides. The relative molecular masses affect the ignition delay times, chemical reaction rates, coherent structures, and turbulent combustion speeds of the flame 25–28 . The macrostructure profile of the lean‐premixed flame shapes needs to be studied under different relative molecular masses and injecting positions.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon dioxide, argon, and helium jets on the synchronous control of combustion instability and NO_x emission

Tao

Zhou

2020

Asia-Pacific J Chem Eng

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This article experimentally studies the synchronous control of combustion instability and NOx emission in a model gas turbine combustor. The application of tabular jet in cross flow was adopted to test the effectiveness of synchronous control. The flow rate, height, direction, and relative molecular masses were studied in this research. Results suggest that the ideal damping ratio of the sound pressure amplitude can be as high as 73.7% under the carbon dioxide jet in cross flow case. The carbon dioxide jet in cross flow case can lead to a better thermoacoustic instability suppression result than the instances of argon or helium. Besides, amplitude and frequency switching of the unsteady flame emerged during the experiment. Adding minimal inert gaseous can change the local oscillation of equivalence ratio. The suppression ratio of NOx emission can reach as high as 44% under the carbon dioxide cases, which performs better than the argon or helium cases. Moreover, the flame length declines as the tabular jet in cross flow rate increases. When the flow rate increases (or the height decreases), the size of the flame front or root will decrease. The average flame length dropped from 122 to 41 mm. The macrostructure of the flame changes significantly under different injecting heights or directions. This article can serve as a specific guideline for the passive control of thermoacoustic instability in gas turbine, rocket, and industrial burners.

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Explosive Behavior of CH4/C2H6/C3H8 Mixtures in the SAGD Process with CO2 Fusion Gases in Extra-Heavy Oil Reservoirs

Wang

Xue

Zun

et al. 2022

Chem Technol Fuels Oils

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Shock tube evaluation on C2H4 ignition delay differences among N2, Ar, He, CO2 diluent gases

Cited by 14 publications

References 27 publications

Effects of oxy jet in cross-flow on the combustion instability and NOx emissions in lean premixed flame

Effects of oxy jet in cross-flow on the combustion instability and NOx emissions in lean premixed flame

Effect of carbon dioxide, argon, and helium jets on the synchronous control of combustion instability and NO_x emission

Explosive Behavior of CH4/C2H6/C3H8 Mixtures in the SAGD Process with CO2 Fusion Gases in Extra-Heavy Oil Reservoirs

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Shock tube evaluation on C2H4 ignition delay differences among N2, Ar, He, CO2 diluent gases

Cited by 14 publications

References 27 publications

Effects of oxy jet in cross-flow on the combustion instability and NOx emissions in lean premixed flame

Effects of oxy jet in cross-flow on the combustion instability and NOx emissions in lean premixed flame

Effect of carbon dioxide, argon, and helium jets on the synchronous control of combustion instability and NOx emission

Explosive Behavior of CH4/C2H6/C3H8 Mixtures in the SAGD Process with CO2 Fusion Gases in Extra-Heavy Oil Reservoirs

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Effect of carbon dioxide, argon, and helium jets on the synchronous control of combustion instability and NO_x emission