The impact of fuel blends and ambient conditions on the heating and evaporation of diesel and biodiesel fuel droplets

Nawar Al‐Esawi, Mansour Qubeissi, Sergei Sazhin

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

Abstract

This work presents recent approaches to the modelling of heating and evaporation of automotive fuel droplets with application to diesel-biodiesel fuel blends in conditions representative of internal combustion engines. The
evolutions of droplet radii and surface temperatures for diesel-biodiesel fuel blends have been predicted using the Discrete Component model (DCM). These blends include up to 112 components (98 diesel hydrocarbons and up to 14 biodiesel components of waste cooking oil and soybean methyl esters). The effects of ambient conditions (ambient pressure and temperature, and radiative temperature) on multi-component fuel droplet heating and evaporation are investigated. Ambient pressures and temperatures, and radiative temperatures in the ranges 20-60 bar, 700-950 K, and 1000-2000k, respectively, are considered. Transient diffusion of 98 hydrocarbons and up to 14 methyl esters, temperature gradient, and recirculation inside droplets, are accounted
for using the DCM. In contrast to previous studies, it is shown that droplet evaporation time and surface temperature predicted for 100% biodiesel (B100) are not always close to those predicted for pure diesel fuel (B0), but are dependent on the biodiesel fuel type and ambient conditions. Finally, the impact of radiation on opaque droplet lifetimes is shown to be significant, leading to about 19.4% and 23.3% faster evaporation for B0 and B100, respectively, compared to the case where radiation is ignored.
Original languageEnglish
Title of host publicationProceedings of the International Heat Transfer Conference 16
PublisherBegell House
Pages6641-6648
Volume18
DOIs
Publication statusPublished - 31 Dec 2018
EventThe 16th International Heat Transfer Conference: IHTC-16 - China National Convention Center, Beijing, China
Duration: 10 Aug 201815 Aug 2018
http://www.ihtc16.org

Publication series

NameInternational Heat Transfer Conference 16
PublisherBegell House
ISSN (Print)2377-424X

Conference

ConferenceThe 16th International Heat Transfer Conference
CountryChina
CityBeijing
Period10/08/1815/08/18
Internet address

Keywords

  • Biodiesel
  • Diesel
  • Droplet
  • Evaporation
  • Fuel blends
  • Radiation

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    Al‐Esawi, N., Qubeissi, M., & Sazhin, S. (2018). The impact of fuel blends and ambient conditions on the heating and evaporation of diesel and biodiesel fuel droplets. In Proceedings of the International Heat Transfer Conference 16 (Vol. 18, pp. 6641-6648). (International Heat Transfer Conference 16). Begell House. https://doi.org/10.1615/IHTC16.mpf.020772