An experimental investigation of the breakup characteristics of secondary atomization of emulsified fuel droplet

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

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)

Abstract

In this study, the breakup characteristics of secondary atomization of an emulsified fuel droplet were investigated with a single droplet experiment. In the single droplet experiment, the emulsified fuel droplet suspended from a fine wire was inserted into an electric furnace, and then secondary atomization behavior was observed using a high-speed video camera. Moreover, a mathematical model to calculate the generated water vapor at micro-explosion was proposed by using the mass and energy conservation equations under some assumptions. In the proposed model, that can be calculated by using the inner droplet temperature history at micro-explosion. As a result, puffing and micro-explosion occurred even when the fine ceramics fiber was used. The proposed model showed that about 50-70 wt% of water in the emulsified fuel changed to water vapor instantaneously at the occurrence of micro-explosion. The mass of water necessary for micro-explosion was shown. The breakup time was closely related to the superheat temperature just before the occurrence of micro-explosion.

Original languageEnglish
Pages (from-to)806-813
Number of pages8
JournalEnergy
Volume35
Issue number2
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Breakup characteristics
  • Emulsified fuel droplet
  • Experiment
  • Secondary atomization

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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