000151229 001__ 151229
000151229 005__ 20250227101505.0
000151229 0247_ $$2doi$$a10.1016/j.combustflame.2025.114060
000151229 0248_ $$2sideral$$a143029
000151229 037__ $$aART-2025-143029
000151229 041__ $$aeng
000151229 100__ $$0(orcid)0000-0003-1337-0310$$aMuelas, Álvaro$$uUniversidad de Zaragoza
000151229 245__ $$aDistinct evaporation and combustion behaviors of suspended and unsuspended nanodiesel droplets
000151229 260__ $$c2025
000151229 5203_ $$aThis work reports the main evaporation and combustion characteristics of diesel droplets doped with different concentrations of alumina and ceria nanoparticles (NPs) for a range of conditions scarcely explored and relevant for combustion applications: high-temperature and reducing/oxidizing atmospheres (0/10 % O2). Due to the potential influence of the particular experimental conditions, all tests are performed using two different setups: a free-falling droplet (FFD) rig and a suspended droplet (SD) facility, following a systematic study that is considered especially pertinent for particle-laden fuels. The reported results demonstrate, for the first time, a great influence of the test method on some of the observed behaviors, which can perfectly justify some contradictions and even inconsistencies observed in previous works. Tests on unsuspended nanodiesel droplets provide smooth evaporation curves until the onset of a single and violent microexplosion that shatters the droplets, whereas the testing of suspended droplets yields a fluctuating evaporation process, with a wide range of sequential disruptive phenomena of different intensities (swelling, puffing, weak microexplosions). These clear differences point to the impact of the suspension filaments on disruptive behaviors for the range of conditions explored, even when very thin ceramic fibers are employed. In spite of these differences, some common features have also been identified. Namely, the addition of NPs does not drive significant changes in the droplet evaporation rate, probably due to the small impact of thermal radiation for the tested conditions. However, the onset of disruptive phenomena shortens the liquid conversion times as compared to neat diesel, with an earlier occurrence as the NP concentration increases, especially for FFD tests. Among the two tested nanoparticles, ceria shows significantly stronger disruptive events and also a progressive reduction in evaporation rate for unsuspended droplets, which is consistent with the formation of a less permeable shell for this kind of NP.
000151229 536__ $$9info:eu-repo/grantAgreement/ES/AEI/PID2022-140620OB-I00
000151229 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000151229 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000151229 700__ $$aPoonawala, Taha
000151229 700__ $$aBallester, Javier
000151229 7102_ $$15001$$2600$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Mecánica de Fluidos
000151229 773__ $$g275 (2025), 114060 [13 pp.]$$pCombust. flame$$tCombustion and Flame$$x0010-2180
000151229 8564_ $$s6316321$$uhttps://zaguan.unizar.es/record/151229/files/texto_completo.pdf$$yVersión publicada
000151229 8564_ $$s2520848$$uhttps://zaguan.unizar.es/record/151229/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000151229 909CO $$ooai:zaguan.unizar.es:151229$$particulos$$pdriver
000151229 951__ $$a2025-02-27-09:28:06
000151229 980__ $$aARTICLE