The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustion
In flames, turbulence can either limit or enhance combustion efficiency by means of strain and mixing. The interactions between turbulent motions and chemistry are crucial to the behaviour of combustion processes. In particular, it is essential to correctly capture non-equilibrium phenomena such as...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Applications in Energy and Combustion Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666352X23000900 |
| _version_ | 1797683007435309056 |
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| author | Arthur Péquin Michael J. Evans Alfonso Chinnici Paul R. Medwell Alessandro Parente |
| author_facet | Arthur Péquin Michael J. Evans Alfonso Chinnici Paul R. Medwell Alessandro Parente |
| author_sort | Arthur Péquin |
| collection | DOAJ |
| description | In flames, turbulence can either limit or enhance combustion efficiency by means of strain and mixing. The interactions between turbulent motions and chemistry are crucial to the behaviour of combustion processes. In particular, it is essential to correctly capture non-equilibrium phenomena such as localised ignition and extinction to faithfully predict pollutant formation. Reactor-based combustion models — such as the Eddy Dissipation Concept (EDC) or Partially Stirred Reactor (PaSR) — may account for turbulence-chemistry interactions at an affordable computational cost by calculating combustion rates relying upon canonical reactors of small fluid size and timescale. The models may include multiscale mixing, detailed chemical kinetic schemes and high-fidelity multispecies diffusion treatments. Although originally derived for conventional, highly turbulent combustion, numerous recent efforts have sought to generalise beyond simple empirical correlations using more sophisticated relationships. More recent models incorporate the estimation of scales based on local variables such as turbulent Reynolds and Damköhler numbers, phenomenological descriptions of turbulence based on fractal theory or specific events such as extinction. These modifications significantly broaden the effective range of operating conditions and combustion regimes these models can be applied to, as in the particular case of Moderate or Intense Low-oxygen Dilution (MILD) combustion. MILD combustion is renown for its ability to deliver appealing features such as abated pollutant emissions, elevated thermal efficiency and fuel flexibility. This review describes the development and current state-of-the-art in finite-rate, reactor-based combustion approaches. Recently investigated model improvements and adaptations will be discussed, with specific focus on the MILD combustion regime. Finally, to bridge the gap between laboratory-scale canonical burners and industrial combustion systems, the current directions and the future outlook for development are discussed. |
| first_indexed | 2024-03-12T00:08:10Z |
| format | Article |
| id | doaj.art-727093be69ee4545b7c87b4a5bb2c368 |
| institution | Directory Open Access Journal |
| issn | 2666-352X |
| language | English |
| last_indexed | 2024-03-12T00:08:10Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applications in Energy and Combustion Science |
| spelling | doaj.art-727093be69ee4545b7c87b4a5bb2c3682023-09-16T05:31:48ZengElsevierApplications in Energy and Combustion Science2666-352X2023-12-0116100201The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustionArthur Péquin0Michael J. Evans1Alfonso Chinnici2Paul R. Medwell3Alessandro Parente4Université Libre de Bruxelles, Aero-Thermo-Mechanics Laboratory, École Polytechnique de Bruxelles, Avenue F.D Roosevelt 50, Brussels, 1050, Belgium; Université Libre de Bruxelles and Vrije Universiteit Brussel, Brussels Institute for Thermal-fluid Systems and Clean Energy (BRITE), Brussels, Belgium; Corresponding author at: Université Libre de Bruxelles, Aero-Thermo-Mechanics Laboratory, École Polytechnique de Bruxelles, Avenue F.D Roosevelt 50, Brussels, 1050, Belgium.UniSA STEM, University of South Australia, Mawson Lakes, AustraliaSchool of Electrical and Mechanical Engineering, University of Adelaide, Adelaide, AustraliaSchool of Electrical and Mechanical Engineering, University of Adelaide, Adelaide, AustraliaUniversité Libre de Bruxelles, Aero-Thermo-Mechanics Laboratory, École Polytechnique de Bruxelles, Avenue F.D Roosevelt 50, Brussels, 1050, Belgium; Université Libre de Bruxelles and Vrije Universiteit Brussel, Brussels Institute for Thermal-fluid Systems and Clean Energy (BRITE), Brussels, BelgiumIn flames, turbulence can either limit or enhance combustion efficiency by means of strain and mixing. The interactions between turbulent motions and chemistry are crucial to the behaviour of combustion processes. In particular, it is essential to correctly capture non-equilibrium phenomena such as localised ignition and extinction to faithfully predict pollutant formation. Reactor-based combustion models — such as the Eddy Dissipation Concept (EDC) or Partially Stirred Reactor (PaSR) — may account for turbulence-chemistry interactions at an affordable computational cost by calculating combustion rates relying upon canonical reactors of small fluid size and timescale. The models may include multiscale mixing, detailed chemical kinetic schemes and high-fidelity multispecies diffusion treatments. Although originally derived for conventional, highly turbulent combustion, numerous recent efforts have sought to generalise beyond simple empirical correlations using more sophisticated relationships. More recent models incorporate the estimation of scales based on local variables such as turbulent Reynolds and Damköhler numbers, phenomenological descriptions of turbulence based on fractal theory or specific events such as extinction. These modifications significantly broaden the effective range of operating conditions and combustion regimes these models can be applied to, as in the particular case of Moderate or Intense Low-oxygen Dilution (MILD) combustion. MILD combustion is renown for its ability to deliver appealing features such as abated pollutant emissions, elevated thermal efficiency and fuel flexibility. This review describes the development and current state-of-the-art in finite-rate, reactor-based combustion approaches. Recently investigated model improvements and adaptations will be discussed, with specific focus on the MILD combustion regime. Finally, to bridge the gap between laboratory-scale canonical burners and industrial combustion systems, the current directions and the future outlook for development are discussed.http://www.sciencedirect.com/science/article/pii/S2666352X23000900Reactor-based turbulence-chemistry modelsCombustion modellingTurbulence-chemistry interactionsModerate or Intense Low-oxygen Dilution (MILD)Eddy Dissipation Concept (EDC)Partially Stirred Reactor (PaSR) |
| spellingShingle | Arthur Péquin Michael J. Evans Alfonso Chinnici Paul R. Medwell Alessandro Parente The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustion Applications in Energy and Combustion Science Reactor-based turbulence-chemistry models Combustion modelling Turbulence-chemistry interactions Moderate or Intense Low-oxygen Dilution (MILD) Eddy Dissipation Concept (EDC) Partially Stirred Reactor (PaSR) |
| title | The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustion |
| title_full | The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustion |
| title_fullStr | The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustion |
| title_full_unstemmed | The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustion |
| title_short | The reactor-based perspective on finite-rate chemistry in turbulent reacting flows: A review from traditional to low-emission combustion |
| title_sort | reactor based perspective on finite rate chemistry in turbulent reacting flows a review from traditional to low emission combustion |
| topic | Reactor-based turbulence-chemistry models Combustion modelling Turbulence-chemistry interactions Moderate or Intense Low-oxygen Dilution (MILD) Eddy Dissipation Concept (EDC) Partially Stirred Reactor (PaSR) |
| url | http://www.sciencedirect.com/science/article/pii/S2666352X23000900 |
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