Simulations of decane-ammonia autoignition in two mixture fractions
This paper presents a zero-dimensional Doubly Conditional Moment Closure (0D-DCMC) methodology for investigating dual-fuel combustion involving ammonia and diesel. The approach uses two mixture fractions as conditioning variables, one for each fuel, to effectively model ignition and reveal the flame...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Mechanical Engineering |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmech.2024.1498820/full |
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| author | Angelos Kylikas Epaminondas Mastorakos Epaminondas Mastorakos |
| author_facet | Angelos Kylikas Epaminondas Mastorakos Epaminondas Mastorakos |
| author_sort | Angelos Kylikas |
| collection | DOAJ |
| description | This paper presents a zero-dimensional Doubly Conditional Moment Closure (0D-DCMC) methodology for investigating dual-fuel combustion involving ammonia and diesel. The approach uses two mixture fractions as conditioning variables, one for each fuel, to effectively model ignition and reveal the flame structure in mixture fraction space. Initially, 0D reactor calculations are performed using Cantera, exploring the chemical mechanism, identifying the most reactive mixture fractions, and determining key species involved in the ignition process. Following that, the 0D-DCMC simulations carried out provide understanding into the effects of the scalar and cross-scalar dissipation rates on autoignition. The results show that higher scalar dissipation rates delay ignition, while a negative cross-scalar dissipation rate reduces ignition delay compared to a positive rate. The ignition is shown to occur near the most reactive mixture fraction of the most reactive fuel, at lower conditional values of the less reactive fuel’s mixture fraction. The species fronts formed are observed to follow a trajectory between the stoichiometric mixture fractions of the fuels. The results establish a robust computational framework for modeling dual-fuel combustion. |
| format | Article |
| id | doaj-art-6b2d64d393284b2abbda24e3373cdf3b |
| institution | Kabale University |
| issn | 2297-3079 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Mechanical Engineering |
| spelling | doaj-art-6b2d64d393284b2abbda24e3373cdf3b2025-01-30T06:22:52ZengFrontiers Media S.A.Frontiers in Mechanical Engineering2297-30792025-01-011010.3389/fmech.2024.14988201498820Simulations of decane-ammonia autoignition in two mixture fractionsAngelos Kylikas0Epaminondas Mastorakos1Epaminondas Mastorakos2Department of Engineering, University of Cambridge, Cambridge, United KingdomDepartment of Engineering, University of Cambridge, Cambridge, United KingdomCambridge Centre for Advanced Research and Education in Singapore (CARES), Singapore, SingaporeThis paper presents a zero-dimensional Doubly Conditional Moment Closure (0D-DCMC) methodology for investigating dual-fuel combustion involving ammonia and diesel. The approach uses two mixture fractions as conditioning variables, one for each fuel, to effectively model ignition and reveal the flame structure in mixture fraction space. Initially, 0D reactor calculations are performed using Cantera, exploring the chemical mechanism, identifying the most reactive mixture fractions, and determining key species involved in the ignition process. Following that, the 0D-DCMC simulations carried out provide understanding into the effects of the scalar and cross-scalar dissipation rates on autoignition. The results show that higher scalar dissipation rates delay ignition, while a negative cross-scalar dissipation rate reduces ignition delay compared to a positive rate. The ignition is shown to occur near the most reactive mixture fraction of the most reactive fuel, at lower conditional values of the less reactive fuel’s mixture fraction. The species fronts formed are observed to follow a trajectory between the stoichiometric mixture fractions of the fuels. The results establish a robust computational framework for modeling dual-fuel combustion.https://www.frontiersin.org/articles/10.3389/fmech.2024.1498820/fullammoniaconditional moment closurenon-premixeddecanedual-fuel |
| spellingShingle | Angelos Kylikas Epaminondas Mastorakos Epaminondas Mastorakos Simulations of decane-ammonia autoignition in two mixture fractions Frontiers in Mechanical Engineering ammonia conditional moment closure non-premixed decane dual-fuel |
| title | Simulations of decane-ammonia autoignition in two mixture fractions |
| title_full | Simulations of decane-ammonia autoignition in two mixture fractions |
| title_fullStr | Simulations of decane-ammonia autoignition in two mixture fractions |
| title_full_unstemmed | Simulations of decane-ammonia autoignition in two mixture fractions |
| title_short | Simulations of decane-ammonia autoignition in two mixture fractions |
| title_sort | simulations of decane ammonia autoignition in two mixture fractions |
| topic | ammonia conditional moment closure non-premixed decane dual-fuel |
| url | https://www.frontiersin.org/articles/10.3389/fmech.2024.1498820/full |
| work_keys_str_mv | AT angeloskylikas simulationsofdecaneammoniaautoignitionintwomixturefractions AT epaminondasmastorakos simulationsofdecaneammoniaautoignitionintwomixturefractions AT epaminondasmastorakos simulationsofdecaneammoniaautoignitionintwomixturefractions |