Pressure effect on NO emission in methane/air lean-premixed flames

Park, Sungwoo

doi:10.1007/s12206-019-0553-1

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…At an equivalence ratio of 0.5, the negative pressure exponent is shown according to the pressure increase. According to literature research, , it is reported that there is no effect of pressure on NO x formation at an equivalent ratio of 0.5. However, in this study, the reaction rate constant of the CH and N 2 reactions (Table ), which is an important reaction of the prompt pathway, depends on the pressure, and since the reaction constant for 100 atm obtained from Klippenstein et al was used, a lower NO x emission may be predicted for 15 atm.…”

Section: Resultsmentioning

confidence: 99%

“…However, the GRI Mech 3.0 has been shown by Santner et al 12 to have a serious limitation in predicting NO x at higher pressure. Park 13 used AramcoMech 3.0 as the basic mechanism and developed a detailed chemical mechanism by incorporating the lately proposed nitrogen chemistry by Glarbog et al 14 and Klippenstein et al 15 to understand the pressure effect on NO x formation in the methane/air premixed flames. In the current study, a detailed chemical mechanism model was developed by incorporating GRI Mech 3.0 (as the base mechanism) with the nitrogen chemical mechanism recently proposed by Glarborg et.al.…”

Section: Introductionmentioning

confidence: 99%

“…However, the GRI Mech 3.0 has been shown by Santner et al to have a serious limitation in predicting NO x at higher pressure. Park used AramcoMech 3.0 as the basic mechanism and developed a detailed chemical mechanism by incorporating the lately proposed nitrogen chemistry by Glarbog et al and Klippenstein et al to understand the pressure effect on NO x formation in the methane/air premixed flames.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of the Pressure Effect on the NO_x Formation in a Lean-Premixed Gas Turbine Combustor

et al. 2021

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In this work, the influence of pressure on NO x formation in a lean-premixed gas turbine combustor is investigated at both atmospheric (1 atm) and elevated (15 atm) pressures. A network of chemical reactors was developed based on the flow, temperature, and species fields obtained using CFD to model the combustion process. Detailed chemical kinetics were developed with a combination of GRI Mech 3.0 and the lately proposed nitrogen chemistry. A premixed combustor was developed for a fullscale atmospheric combustion test. The model predictions with the proposed mechanism were validated with the experimental data at atmospheric pressure. The combustion in the gas turbine combustor was simulated at 1 and 15 atm and equivalence ratios of 0.45, 0.5, and 0.55. The present study focuses on the effects of pressure on NO x emissions by analyzing the NO formation pathways. In the zone of the main flame, prompt and NNH NO formations are relatively similar to thermal and N 2 O NO formations; however, thermal and N 2 O NO formations are dominant in the recirculation and the post flame zone. The predicted NO x emission at the elevated pressure (15 atm) increases at the equivalence ratio 0.55 showing the positive pressure exponential dependency, but at the equivalence ratio of 0.45, it shows the negative pressure exponent dependency. At the equivalence ratio Φ = 0.5 the predicted NO x emissions were similar showing the weak negative pressure dependency. The path analysis was conducted to understand the effect of pressure.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of the Pressure Effect on the NO_x Formation in a Lean-Premixed Gas Turbine Combustor

et al. 2021

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“…As a result, defining the fire spread through bench-scale experiments is sometimes a limited approach. Recently, research has been conducted to predict the fire spread of combustibles through simulation [15,16]. However, prediction of thermal decomposition and fire spread phenomena of combustibles through simulation requires the input of numerous factors, such as activation energy, pre-exponential factor, and heat of combustion (including thermal properties).…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Fire Spread Rate and Separation Distance between Facing Stores in Passage-Type Traditional Markets

Yun

Nam²,

Hwang

2020

Energies

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Real-scale fire experiments were conducted to understand the fire spread characteristics of the major combustibles handled in traditional markets, a space with high fire risk. The major combustibles were selected through field surveys administered at a number of traditional markets. Through real-scale fire experiments, the horizontal fire spread rate according to the maximum heat release rate of major combustibles was examined. In addition, the separation distance to prevent fire spread to the facing store by radiant heat transfer was examined. As a result of the experiments, it was confirmed that the arrangement method of the combustibles causes a large change in the maximum heat release rate, fire growth rate, and fire spread rate. The horizontal fire spread rate showed a linear proportional relationship with respect to the maximum heat release rate regardless of the type of combustibles, and a correlation to define the relationship was proposed. A correlation equation for predicting the separation distance that can prevent fire spread by radiant heat transfer was proposed, and the curve by the correlation equation was in good agreement with the experimental results. Through this study, it is expected that the correlation proposed to examine the horizontal fire spread rate and the separation distance of major combustibles in a traditional market can be usefully used in the design of fire protection systems to reduce fire damage in the traditional market.

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Effect of hydrogen addition on the combustion and emission characteristics of methane under gas turbine relevant operating condition

Sun

Zhang²,

Huang³

et al. 2022

Fuel

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Pressure effect on NO emission in methane/air lean-premixed flames

Cited by 6 publications

References 26 publications

Numerical Investigation of the Pressure Effect on the NO_x Formation in a Lean-Premixed Gas Turbine Combustor

Numerical Investigation of the Pressure Effect on the NO_x Formation in a Lean-Premixed Gas Turbine Combustor

An Experimental Study on the Fire Spread Rate and Separation Distance between Facing Stores in Passage-Type Traditional Markets

Effect of hydrogen addition on the combustion and emission characteristics of methane under gas turbine relevant operating condition

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Pressure effect on NO emission in methane/air lean-premixed flames

Cited by 6 publications

References 26 publications

Numerical Investigation of the Pressure Effect on the NOx Formation in a Lean-Premixed Gas Turbine Combustor

Numerical Investigation of the Pressure Effect on the NOx Formation in a Lean-Premixed Gas Turbine Combustor

An Experimental Study on the Fire Spread Rate and Separation Distance between Facing Stores in Passage-Type Traditional Markets

Effect of hydrogen addition on the combustion and emission characteristics of methane under gas turbine relevant operating condition

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Product

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Numerical Investigation of the Pressure Effect on the NO_x Formation in a Lean-Premixed Gas Turbine Combustor

Numerical Investigation of the Pressure Effect on the NO_x Formation in a Lean-Premixed Gas Turbine Combustor