SELF-IGNITION AND THE INDUCTION PERIOD OF A DROP OF LIQUID FUEL,

Abstract

The ignition of hexane, n-octane, and cetane droplets (0.0014-0.002 m in diameter) was studied by suspending the droplets from a quartz filament in a vertical tube through which preheated air was passed at velocities of 1.3-4.9 m/sec. The ignition process was studied by motion picture photography and induction time vs air temperature plots were obtained. A theoretical analysis yielded a formula for the dimensionless induction time. It is concluded that the studied fuels cannot ignite at the wet bulb temperature but they always ignite at a lower temperature. The induction time changes with the temperature of the medium faster than the temperature gradient across the droplet-medium interphase. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 07, 1968
Accession Number
AD0679516

Entities

People

  • E. F. Tarasova
  • F. A. Agafonova
  • M. A. Gurevich

Organizations

  • National Air and Space Intelligence Center

Tags

DTIC Thesaurus Topics

  • Air Temperature
  • Autoignition
  • Cameras
  • Ignition
  • Isotherms
  • Motion Picture Photography
  • Motion Pictures
  • Photographic Equipment
  • Photographic Materials
  • Photographic Recording Media
  • Photographs
  • Photography
  • Temperature Gradients
  • Wet Bulb Temperature

Readers

  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.