Visualization of Internal Behavior in Emulsified Fuel Droplets and the Effect of Surfactant on Secondary Atomization

Yoshiyuki Suzuki, Takuji Harada, Masakazu Shoji, Hirotatsu Watanabe, Yohsuke Matsushita, Hideyuki Aoki, Takatoshi Miura

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The occurrence of secondary atomization in emulsified fuel is widely accepted to explain a decrease in NOx and soot emissions. Although it is known that secondary atomization, such as puffing and micro-explosion, occurs in heating process, little detailed information is available on the secondary atomization behavior of emulsified fuel droplets. In this paper, the effect of surfactant on secondary atomization was investigated. A method was proposed to visualize the internal behavior in emulsified fuel droplets using colored water. Emulsified fuel droplets prepared using various surfactants and colored water were suspended by use of a thermocouple, and the secondary atomization behavior of the droplets was observed using a hi-speed video camera. In the case of O/W emulsified fuel droplets, reaggregation of dispersed water droplets and micro-explosion were observed after aggregation of dispersed oil droplets and phase inversion from O/W type to W/O type. Although the probability of micro-explosion occurring decreased with an increase in HLB value in the case of W/O emulsified fuel droplets, little difference was observed in the probability as a function of HLB value in the case of O/W emulsified fuel droplets.

Original languageEnglish
Pages (from-to)557-565
Number of pages9
Journalkagaku kogaku ronbunshu
Volume36
Issue number6
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

  • Emulsified fuel
  • HLB value
  • Secondary atomization
  • Surfactant
  • Visualization

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Visualization of Internal Behavior in Emulsified Fuel Droplets and the Effect of Surfactant on Secondary Atomization'. Together they form a unique fingerprint.

Cite this