IGNITION CHARACTERISTICS OF FUELS AND LUBRICANTS

Abstract

Ignition temperatures of n-hexane, n-octane, n-decane, JP-6 jet fuel and aircraft engine oil MIL-L-7808 (0-60-18) were determined in air using heated Pyrex cylinders of 0.314-inch to 1.38-inch diameter and Nichrome wires, rods, or tubes of 0.016-inch to 0.75-inch diameter. The ignition temperature varied little with fuel-air ratio but increased as the size of the heat source was decreased. Expressions are given which define the variation of the hot surface ignition temperatures of these combustibles with the radius and the surface area of the heat source. The expressions are applicable to stagnant or low velocity flow conditions (<0.2 in/sec). In addition, the hot gas ignition temperatures of the combustible vapor-air mixtures were determined with 1/4, 3/8 and 1/2-inch diameter jets of hot air. These ignition temperatures also varied little with fuel-air ratio and increased as the diameter of the heat source was decreased.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1963
Accession Number
AD0600002

Entities

People

  • Alphonse Bartkowiak
  • Joseph M. Kuchta
  • Michael G. Zabetakis
  • Ralph J. Cato

Tags

Communities of Interest

  • Biomedical
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aircraft Engine Oils
  • Aircraft Engines
  • Aircrafts
  • Autoignition
  • Aviation Fuels
  • Chemical Reactions
  • Combustion
  • Engines
  • Flow Rate
  • Fuel Air Ratio
  • Fuels
  • Hot Gases
  • Hydrocarbon Fuels
  • Ignition
  • Jet Engine Fuels
  • Materials
  • Materials Laboratories

Readers

  • Combustion science or combustion engineering.
  • Petroleum Engineering
  • Thermal Physics or Thermal Science.