HYPERGOLIC IGNITION AT REDUCED PRESSURES. PART 2

Abstract

A mathematical model of hypergolic ignition in reaction control systems was developed based on physical kinetics of droplet evaporation and chemical kinetics of ignition reactions. Reasonable agreement between theoretical and experimental ignition delays were obtained. The dominant ignition reactions of N2O4 with the hydrazine fuels at reduced pressures were found to be thermal, gas phase reactions which are bimolecular with low activation energies and pre-exponential factors. A pre-ignition reaction product was found which is a clear, yellow, viscous liquid with a very low vapor pressure. The 'adduct' has the characteristics of a monopropellant. Of six additives tested, only furfuryl alcohol had a significant beneficial effect on the ignition characteristics of N2O4/MMH. The influence of thrust chamber design parameters on the ignition delay and pressure transients of Compound A with N2H4, UDMH and MHF-5 and also gaseous F2/H2 was investigated.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1966
Accession Number
AD0369585

Entities

People

  • Albert D. Corbett
  • Bruce E. Dawson
  • Marcel M. Vanpee
  • Thomas F. Seamans

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Kinetics
  • Chemical Reaction Properties
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Combustion
  • Control Systems
  • Ethers
  • Exothermic Reactions
  • Fuel Additives
  • Heat Energy
  • Heat Transfer
  • Hypergolic Ignition
  • Ignition
  • Ignition Lag
  • Measurement
  • Partial Pressure

Fields of Study

  • Chemistry

Readers

  • Combustion science or combustion engineering.
  • Organic Chemistry