Abstract
MILD combustion, also known as Flameless combustion, is a relatively new combustion concept which has a unique potential in enhancement of efficiency and reduction of emissions, in particular NOx. Very recently, the idea of using alternative fuels such as Syngas in MILD combustion has been emerged as a very clean combustion technology which has notable environmental and economic advantages. Exploitation ofMILD/Syngas combustion in industrial applications has been largely hindered by the lack of knowledge in complex processes associated with its stabilization. The stabilization mechanism of MILD combustion is mainly based on autoignition and presence of H2 introduces preferential diffusion effects. In this study, we conduct 3D DNS of MILD combustion with CH4/H2 fuels using detailed chemistry and transport models in order to obtain a better understanding of autoignition and preferential differential effects in MILD/Syngas combustion condition. A reduced flamelet-based chemistry model is developed to include these effects using Igniting Mixing Layer (IML) Flamelets. This model shows a considerable improvement compared to the commonly-used Igniting Counterflow (ICF) Flamelets. Findings of this study will broaden our knowledge on such a complex combustion regime, and provide reduced models for accurate RANS/LES simulations of turbulent Mild flames in the future.
| Original language | English |
|---|---|
| Publication status | Published - 1 Jan 2017 |
| Event | 10th U.S. National Combustion Meeting - College Park, United States Duration: 23 Apr 2017 → 26 Apr 2017 |
Conference
| Conference | 10th U.S. National Combustion Meeting |
|---|---|
| Country | United States |
| City | College Park |
| Period | 23/04/17 → 26/04/17 |
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Keywords
- Direct Numerical Simulations
- Flamelet Generated Manifolds
- Preferential Diffusion Effects
- Turbulent Combustion
Cite this
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A novel flamelet-based model for 3D DNS of Mild combustion with CH4/H2 fuels. / Abtahizadeh, Ebrahim; van Oijen, Jeroen; Bastiaans, Rob; de Goey, Philip.
2017. Paper presented at 10th U.S. National Combustion Meeting, College Park, United States.Research output: Contribution to conference › Paper › Academic
TY - CONF
T1 - A novel flamelet-based model for 3D DNS of Mild combustion with CH4/H2 fuels
AU - Abtahizadeh, Ebrahim
AU - van Oijen, Jeroen
AU - Bastiaans, Rob
AU - de Goey, Philip
PY - 2017/1/1
Y1 - 2017/1/1
N2 - MILD combustion, also known as Flameless combustion, is a relatively new combustion concept which has a unique potential in enhancement of efficiency and reduction of emissions, in particular NOx. Very recently, the idea of using alternative fuels such as Syngas in MILD combustion has been emerged as a very clean combustion technology which has notable environmental and economic advantages. Exploitation ofMILD/Syngas combustion in industrial applications has been largely hindered by the lack of knowledge in complex processes associated with its stabilization. The stabilization mechanism of MILD combustion is mainly based on autoignition and presence of H2 introduces preferential diffusion effects. In this study, we conduct 3D DNS of MILD combustion with CH4/H2 fuels using detailed chemistry and transport models in order to obtain a better understanding of autoignition and preferential differential effects in MILD/Syngas combustion condition. A reduced flamelet-based chemistry model is developed to include these effects using Igniting Mixing Layer (IML) Flamelets. This model shows a considerable improvement compared to the commonly-used Igniting Counterflow (ICF) Flamelets. Findings of this study will broaden our knowledge on such a complex combustion regime, and provide reduced models for accurate RANS/LES simulations of turbulent Mild flames in the future.
AB - MILD combustion, also known as Flameless combustion, is a relatively new combustion concept which has a unique potential in enhancement of efficiency and reduction of emissions, in particular NOx. Very recently, the idea of using alternative fuels such as Syngas in MILD combustion has been emerged as a very clean combustion technology which has notable environmental and economic advantages. Exploitation ofMILD/Syngas combustion in industrial applications has been largely hindered by the lack of knowledge in complex processes associated with its stabilization. The stabilization mechanism of MILD combustion is mainly based on autoignition and presence of H2 introduces preferential diffusion effects. In this study, we conduct 3D DNS of MILD combustion with CH4/H2 fuels using detailed chemistry and transport models in order to obtain a better understanding of autoignition and preferential differential effects in MILD/Syngas combustion condition. A reduced flamelet-based chemistry model is developed to include these effects using Igniting Mixing Layer (IML) Flamelets. This model shows a considerable improvement compared to the commonly-used Igniting Counterflow (ICF) Flamelets. Findings of this study will broaden our knowledge on such a complex combustion regime, and provide reduced models for accurate RANS/LES simulations of turbulent Mild flames in the future.
KW - Direct Numerical Simulations
KW - Flamelet Generated Manifolds
KW - Preferential Diffusion Effects
KW - Turbulent Combustion
UR - http://www.scopus.com/inward/record.url?scp=85048988413&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85048988413
ER -