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Combined experimental and numerical studies on soot characteristics of diesel sprays with split injection strategies

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Combined experimental and numerical studies on soot characteristics of diesel sprays with split injection strategies

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dc.contributor.author Xuan, Tiemin es_ES
dc.contributor.author Maes, Noud es_ES
dc.contributor.author García-Oliver, José M es_ES
dc.contributor.author De Leon-Ceriani, Daiana es_ES
dc.contributor.author Pachano-Prieto, Leonardo Manuel es_ES
dc.contributor.author He, Zhixia es_ES
dc.date.accessioned 2023-07-03T18:01:22Z
dc.date.available 2023-07-03T18:01:22Z
dc.date.issued 2022-12 es_ES
dc.identifier.issn 0010-2180 es_ES
dc.identifier.uri http://hdl.handle.net/10251/194639
dc.description.abstract [EN] Experimental and numerical studies on the soot characteristics of Spray A flames were conducted with a focus on the effects of different split injection strategies in high-pressure high-temperature vessels within the engine combustion network. Three high-speed imaging techniques were used to obtain the transient information of flame evolution. Schlieren was applied to identify the spray boundaries and spray penetration. Moreover, a combined extinction and radiation technique was applied to quantify the spatial soot and temperature fields simultaneously. Finally, high-speed OH * chemiluminescence was applied at the baseline condition to measure the temporal high-temperature flame evolution. To substantiate the analysis, the experimental results were compared with the computational fluid dynamics (CFD) predictions from a Reynolds-averaged Navier Stokes approach with Unsteady Flamelet Progress Variable combustion and a two-equation soot-in-flamelet models, which qualitatively reproduced the experimental results.According to the chosen split injection strategy, dwell and first-injection pulse durations were varied. For all cases, the ignition delay (ID) and soot production of the second-injection pulse were shorter and higher than those of the first one, respectively. A slight change in the experimental soot production was observed when the dwell time was changed. The CFD calculations revealed a small reduction in the ID of the second pulse with long dwell times, which was due to variations in the interaction between the newly injected fuel and combustion recession. However, the effect of dwell variation was extremely small to produce significant differences in the evolution of the second pulse, neither in combustion nor in soot production. With regard to the duration of the first injection, no effect on the experimental soot production of the second pulse was observed despite noticeable differences due to the first pulse. The CFD results indicated that because of the quasi-steady flow and combustion process near the nozzle along the first injection, the evolution of the spray in the region close to the nozzle was identical in all first-pulseduration cases, with differences only occurring at the tip of the first pulse jet. Thus, the second pulse evolution occurred under identical conditions for ignition and soot production. Although the sensitivity to both dwell and first-pulse durations was low, the CFD analysis highlighted the important effects of both end-of-injection wave propagation and combustion recession on the ignition and soot production of the second pulse. es_ES
dc.description.sponsorship This research work has been partially supported by the National Natural Science Foundation of China (51906087) and the Natural Science Foundation of Jiangsu Province (BK20190856) . es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Combustion and Flame es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Spray A es_ES
dc.subject Soot es_ES
dc.subject Split -injection es_ES
dc.subject Dodecane es_ES
dc.subject Flamelet model es_ES
dc.subject Engine combustion network es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Combined experimental and numerical studies on soot characteristics of diesel sprays with split injection strategies es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.combustflame.2022.112384 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/NSFC//51906087/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/Natural Science Foundation of Jiangsu Province//BK20190856/ es_ES
dc.rights.accessRights Abierto 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 Xuan, T.; Maes, N.; García-Oliver, JM.; De Leon-Ceriani, D.; Pachano-Prieto, LM.; He, Z. (2022). Combined experimental and numerical studies on soot characteristics of diesel sprays with split injection strategies. Combustion and Flame. 246:1-17. https://doi.org/10.1016/j.combustflame.2022.112384 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.combustflame.2022.112384 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 17 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 246 es_ES
dc.relation.pasarela S\488636 es_ES
dc.contributor.funder National Natural Science Foundation of China es_ES
dc.contributor.funder Natural Science Foundation of Jiangsu Province es_ES
dc.contributor.funder Universitat Politècnica de València es_ES
dc.subject.ods 07.- Asegurar el acceso a energías asequibles, fiables, sostenibles y modernas para todos es_ES


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