Vaporization and autoignition characteristics of ethanol and 1-propanol droplets : influence of water
type: Dataset
description: Detailed investigation of the vaporization of an isolated of ethanol and 1-propanol droplet was carried out in this experimental study. The experimental set-up consists of a heated chamber with a cross quartz fibers configuration as droplet support. An alcohol droplet is located at the intersection of the cross quartz fibre with a controlled initial diameter (300-600µm). Ambient temperature is varied from 298 to 973K at atmospheric pressure. The quasi-steady theory has been used to compare and to explain all experimental results. The real impact of the water concentration on the vaporization rate of an ethanol droplet is also examined, where two ‘quasi-steady’ periods are observed on the d2-curves, clearly showing that the vaporization of an ethanol droplet is accompanied by the simultaneous condensation of water vapour on the droplet surface and thus the temporal evolution of the droplet squared diameter exhibits an unsteady behavior. The histories of the instantaneous vaporization rates of both 1-propanol and ethanol droplets confirm this phenomenon. The autoignition experimental study of ethanol, 1-propanol and blends of ethanol and water have been carried out in a rapid compression machine at a compressed pressure of 30bar over a temperature range of 750-860K for stoichiometric mixture of fuel and air. The ignition delay times recorded show a significant decrease with increasing temperature. 1-propanol is more reactive than ethanol, which results in shorter ignition delay times. However, water addition to ethanol increases the reactivity of the mixture and results in a shorter ignition delay times than 1-propanol
identifier: NNT: 2013DIJOS004
issued: 2026-05-08T02:14:05.894579
language: en
modified: 2026-05-08T02:14:05.894585
contact point: Organization
  fn: CCSD
keyword: alcohols
keyword: autoignition-delay-time
keyword: average-and-instantaneous-vaporization-rate
keyword: chimothechemical-sciencesother
keyword: d2-law
keyword: droplet
keyword: infoeu-reposemanticsdoctoralthesis
keyword: kinetic-mechanisms
keyword: pas-de-mot-cle-en-francais
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: sdvaenlife-sciences-q-biofood-and-nutrition
keyword: spiotherengineering-sciences-physicsother
keyword: theses
keyword: vaporization
keyword: water-vapour
landing page: https://theses.hal.science/tel-00909646

Vaporization and autoignition characteristics of ethanol and 1-propanol droplets : influence of water
type: Distribution
format: HTML
issued: 2026-05-08T02:14:05.898367
modified: 2026-05-08T02:14:05.868711
access URL: https://theses.hal.science/tel-00909646

test_moissonnage_selune
type: Agent