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The Effect of Multi-Component Fuel Evaporation on the Ignition of JP-8

[+] Author Affiliations
R. Joklik, C. Fuller, B. Turner, P. Gokulakrishnan

Combustion Science & Engineering, Inc., Columbia, MD

Paper No. GT2010-22990, pp. 813-822; 10 pages
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 2: Combustion, Fuels and Emissions, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4397-0 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME


In this work distillation curve (DC) and probability distribution function (PDF) models of multi-component droplet evaporation were investigated in order to determine the feasibility of recovering information about the gas-phase composition from a minimal number of variables associated with the droplet. Both models were assessed against a discrete component model based on the classic B-number formulation using a 63 component model of JP-8. The results indicate that, although the gas-phase fuel composition may undergo large changes during the droplet lifetime, it is possible to recover composition information in terms of the major classes of species present with reasonable accuracy (+/− 5%) using the DC and PDF models. The potential impact of variation in gas-phase fuel composition was investigated by performing ignition delay time (IDT) calculations using two detailed chemical kinetic mechanisms for JP-8. The results indicate that, especially in the low temperature region (700 K – 900 K), variation in gas-phase fuel composition can have a large impact on the ignition delay time. Experimental IDT measurements at 900 and 950 K showed a larger variation in IDT due to composition than that predicted by the models.

Copyright © 2010 by ASME
Topics: Fuels , Evaporation , Ignition



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