Micro-explosion and autoignition of composite fuel/water droplets

Dmitrii V. Antonov, Genii V. Kuznetsov, Pavel A. Strizhak, Oyuna Rybdylova, Sergei S. Sazhin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The results of experimental investigations of puffing, micro-explosions and autoignition of composite fuel/water droplets free falling in a high temperature air are presented. The measurements were performed for non-mixed and premixed Diesel fuel/water and rapeseed oil/water droplets. Air temperature was in the range 850–1100 °C, initial droplet radii were in the range 0.62–1.34 mm, and relative volume fractions of fuel (Diesel fuel or rapeseed oil) were in the range 3–97%. It is shown that the time to micro-explosion decreases with increasing temperature, weakly depends on the volume fraction of fuel, and increases with increasing droplet sizes. The latter trend is shown to be consistent with the prediction of the previously developed simple model for droplet puffing/micro-explosion based on the assumption that the water component forms a spherical sub-droplet located in the centre of a fuel droplet. It is shown that the autoignition delay time for composite droplets, close to the time to micro-explosion for both fuels under consideration, is almost an order of magnitude less than that for pure fuel droplets.

Original languageEnglish
Pages (from-to)479-489
Number of pages11
JournalCombustion and Flame
Volume210
DOIs
Publication statusPublished - 1 Dec 2019

Fingerprint

spontaneous combustion
Explosions
explosions
composite materials
Water
Composite materials
water
diesel fuels
oils
fuel oils
Diesel fuels
high temperature air
Volume fraction
Fuel Oils
falling
time lag
Air
trends
Temperature
radii

Keywords

  • Autoignition
  • Diesel fuel
  • Micro-explosions
  • Puffing
  • Rapeseed oil
  • Water

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

Micro-explosion and autoignition of composite fuel/water droplets. / Antonov, Dmitrii V.; Kuznetsov, Genii V.; Strizhak, Pavel A.; Rybdylova, Oyuna; Sazhin, Sergei S.

In: Combustion and Flame, Vol. 210, 01.12.2019, p. 479-489.

Research output: Contribution to journalArticle

Antonov, Dmitrii V. ; Kuznetsov, Genii V. ; Strizhak, Pavel A. ; Rybdylova, Oyuna ; Sazhin, Sergei S. / Micro-explosion and autoignition of composite fuel/water droplets. In: Combustion and Flame. 2019 ; Vol. 210. pp. 479-489.
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