000147015 001__ 147015
000147015 005__ 20241205091043.0
000147015 0247_ $$2doi$$a10.1016/j.energy.2024.133765
000147015 0248_ $$2sideral$$a140743
000147015 037__ $$aART-2024-140743
000147015 041__ $$aeng
000147015 100__ $$0(orcid)0000-0001-6663-0740$$aPoonawala, Taha$$uUniversidad de Zaragoza
000147015 245__ $$aEvaporation and combustion of low asphaltene heavy oil droplets under conditions representative of practical applications
000147015 260__ $$c2024
000147015 5060_ $$aAccess copy available to the general public$$fUnrestricted
000147015 5203_ $$aThe evaporation and burning characteristics of isolated heavy fuel oil (HFO) droplets are experimentally studied at conditions representative of practical applications, producing novel, detailed results on the effect of oxygen concentration. Also, and for the first time for HFO, the temporal evolution of the flame stand-off ratio (based on CH∗ emission) and the cenosphere burning size are presented along with the droplet size histories. The effect of ambient oxygen concentration is first analyzed qualitatively, identifying different sub-stages. Later, a quantitative analysis is presented in terms of ignition delay time, micro-explosion regimes, shell swelling ratio, cenosphere size and several time metrics. The results show that, as ambient oxygen changes, the liquid and solid stages show marked differences not only in terms of time scales but also in the transition of burning regimes. Cenospheres generated in oxygen-free conditions are found to be ∼1.4 times larger than those in droplet combustion. Although similar in size, the solid-to-liquid consumption time ratio in 5% O2 is found to be significantly longer, about twice than for the 10% O2 ambient. The characterization of these differences is thought to be relevant not only for oil flames but also for the promising future of heavy oil gasification applications.
000147015 536__ $$9info:eu-repo/grantAgreement/ES/AEI/PID2019-109747RB-I00$$9info:eu-repo/grantAgreement/ES/MICINN PRE2020-094620
000147015 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000147015 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000147015 700__ $$0(orcid)0000-0003-1337-0310$$aMuelas, Alvaro$$uUniversidad de Zaragoza
000147015 700__ $$0(orcid)0000-0003-2863-4681$$aBallester, Javier$$uUniversidad de Zaragoza
000147015 7102_ $$15001$$2600$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Mecánica de Fluidos
000147015 773__ $$g313 (2024), 133765 [12 pp.]$$pEnergy$$tEnergy$$x0360-5442
000147015 8564_ $$s4886695$$uhttps://zaguan.unizar.es/record/147015/files/texto_completo.pdf$$yVersión publicada
000147015 8564_ $$s2381233$$uhttps://zaguan.unizar.es/record/147015/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000147015 909CO $$ooai:zaguan.unizar.es:147015$$particulos$$pdriver
000147015 951__ $$a2024-12-05-08:46:40
000147015 980__ $$aARTICLE