Characterization of global combustion properties with simple fuel property measurements for alternative jet fuels

Sang Hee Won, Peter S. Veloo, Jeffrey Santner, Yiguang Ju, Frederick L. Dryer, Stephen Dooley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Global combustion characteristics of one conventional jet fuel (JP-8) and four nonpetroleum alternative jet fuels (Shell Synthetic Paraffinic Kerosene (SPK), Sasol Iso- Paraffinic Kerosene (IPK), Hydrotreated Renewable Jet (HRJ Camelina and HRJ Tallow)) are experimentally examined. The ranking of the fully pre-vaporized global combustion characteristics of these five fuels has been hypothesized a priori based on the relative values for four fuel combustion property targets used in the formulation of surrogate jet fuel mixtures in recent studies by the authors. In order to validate a priori speculation, the pure chemical kinetic reactivities of these fuels have been compared by performing oxidation reactivity experiments in a high pressure flow reactor and fundamental flame measurements. The oxidation reactivity profile for Sasol IPK demonstrates no low temperature oxidative characteristic of the occurrence of active alkyl peroxy radical oxidation mechanisms, whereas the remaining jet fuels demonstrate extensive reactivity between 550 and 750 K. Despite sharing similar derived cetane numbers, Shell SPK shows the more pronounced low temperature reactivity compared to the other alternative jet fuels. Two fundamental flame measurements at near-limit condition, both extinction limits of diffusion flames and critical flame initiation radii of outwardly propagating premixed flames, were used to investigate differences chemical kinetic/transport coupled high temperature combustion behaviors. Strained extinction measurements identify the pronounced high reactivity of Shell SPK, whereas critical radius measurements exhibit the distinctive low reactivity of Sasol IPK. Additional analyses along with available literature measurements indicate that the proposed four fuel combustion property targets can be used to predict the relative pre-vaporized global combustion properties of the tested petroleumderived and alternative jet fuels. Finally, further detailed understanding and improvements on DCN and TSI determination methodologies, particularly for alternative jet fuels, are addressed as a prerequisite condition to better parameterizing the combustion property targets, thus improving the quantitative predictability of a provisional combustion property target (CPT) Index. The CPT index appears useful in screening the relative global combustion properties of real petroleum derived fuels, non-petroleum alternative fuels, and their mixtures.

Original languageEnglish (US)
Title of host publication50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624103032
DOIs
StatePublished - Jan 1 2014
Event50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and exhibit 2014 - Cleveland, United States
Duration: Jul 28 2014Jul 30 2014

Publication series

Name50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014

Other

Other50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and exhibit 2014
CountryUnited States
CityCleveland
Period7/28/147/30/14

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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    Won, S. H., Veloo, P. S., Santner, J., Ju, Y., Dryer, F. L., & Dooley, S. (2014). Characterization of global combustion properties with simple fuel property measurements for alternative jet fuels. In 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014 (50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2014-3469