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Unsteady Flamelet modeling study on OMEx-type fuels under Engine Combustion Network Spray A conditions

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Unsteady Flamelet modeling study on OMEx-type fuels under Engine Combustion Network Spray A conditions

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dc.contributor.author Benajes, Jesús es_ES
dc.contributor.author García-Oliver, José M es_ES
dc.contributor.author Pastor Enguídanos, José Manuel es_ES
dc.contributor.author De Leon-Ceriani, Daiana es_ES
dc.date.accessioned 2024-04-11T11:29:16Z
dc.date.available 2024-04-11T11:29:16Z
dc.date.issued 2023-01-01 es_ES
dc.identifier.issn 0016-2361 es_ES
dc.identifier.uri http://hdl.handle.net/10251/203396
dc.description.abstract [EN] Poly-Oxymethylene Dimethyl Ethers OMEx are synthetic and potentially-renewable fuels that lead to a notable reduction of the lifecycle CO2 emissions while promoting lower soot emissions than conventional Diesel fuel. In the present contribution, a computational study with a single component OME1 and a multicomponent OMEx fuel has been carried out under reference Spray A conditions from the Engine Combustion Network (ECN), which mimic in-cylinder conditions representative of Diesel engines. For both fuels, three ambient temperature conditions have been swept at constant ambient density. Calculations have been carried out using an Unsteady Flamelet Progress Variable (UFPV) combustion model and detailed chemical mechanisms. For both OMEx-type fuels, low temperature ignition in flamelet configurations start in lean mixtures, which shifts towards the fuel -rich zone and eventually leads to high temperature ignition, similar to typical hydrocarbons. In agreement with corresponding fuel cetane numbers, ignition of OMEx occurs at timings similar to those of n-dodecane, which is the reference fuel for ECN studies, while a delayed ignition is obtained for OME1. However, the actual difference in ignition timing between OMEx and n-dodecane depends on diffusion in the mixture fraction space. Moreover, ignition in spray calculations seems to occur fully on the lean side, especially for OME1, as well as for the low temperature cases. This difference in ignitable mixture range between the canonical flamelet configuration and the spray calculations results from the finite residence time for relevant mixtures in the latter case, compared to an infinite residence time in flamelets. Comparison with experiments show that the modeling approach predicts most combustion metrics for both fuels and temperature values. The combination of ambient temperature and fuel-related reactivity has enabled a transition from a short ignition lifted diffusion flame structure (OMEx at 1000-900 K) towards long ignition cases, where lift-off length may eventually be longer than the maximum length of the stoichiometric surface. This results in a reaction front stabilization at very lean conditions, i.e. a type of lean mixing-controlled flame. es_ES
dc.description.sponsorship Funding for open access charge: CRUE-Universitat Politècnica de València es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Fuel es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Poly-Oxymethylene Dimethyl Ethers es_ES
dc.subject ECN es_ES
dc.subject Spray A es_ES
dc.subject CFD es_ES
dc.subject Flamelet es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Unsteady Flamelet modeling study on OMEx-type fuels under Engine Combustion Network Spray A conditions es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.fuel.2022.125458 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario CMT-Motores Térmicos - Institut Universitari CMT-Motors Tèrmics es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny es_ES
dc.description.bibliographicCitation Benajes, J.; García-Oliver, JM.; Pastor Enguídanos, JM.; De Leon-Ceriani, D. (2023). Unsteady Flamelet modeling study on OMEx-type fuels under Engine Combustion Network Spray A conditions. Fuel. 331. https://doi.org/10.1016/j.fuel.2022.125458 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.fuel.2022.125458 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 331 es_ES
dc.relation.pasarela S\488633 es_ES
dc.contributor.funder Universitat Politècnica de València es_ES
dc.subject.ods 03.- Garantizar una vida saludable y promover el bienestar para todos y todas en todas las edades es_ES


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