Comparison of laminar flame speeds, extinction stretch rates and vapor pressures of jet A-1/HRJ biojet fuel blends

Jeffrey D. Munzar, Ahmed Zia, Philippe Versailles, Rodrigo Jiménez, Jeffrey M. Bergthorson, Benjamin Akih-Kumgeh

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

5 Scopus citations

Abstract

An emerging goal within the aviation industry is to replace conventional jet fuel with biologically-derived alternative fuel sources. However, the combustion properties of these potential fuels must be thoroughly characterized before they can be considered as replacements in turbomachinery applications. In this study, seven candidate alternative fuel blends, derived from two biological feedstocks and blended in different quantities with Jet A-1, are considered. For each blend, the laminar flame speed, non-premixed extinction stretch rate, and vapor pressure are experimentally determined and compared to numerical simulations and to Jet A-1 data. Hydrodynamically-stretched flame speeds are determined by applying particle image velocimetry (PIV) to an atmospheric pressure, preheated jet-wall stagnation flame, and the unstretched laminar flame speed is inferred using a direct comparison method in conjunction with a binary jet-fuel surrogate, with results spanning a wide equivalence ratio range. Extinction stretch rates were measured using particle tracking velocimetry (PTV) in a non-premixed counterflow diffusion flame, over a range of fuel mass fractions diluted in nitrogen carrier gas. Finally, the vapor pressure of the seven biojet/Jet A-1 fuel blends was measured using an isoteniscope over a wide temperature range. The results of this study indicate that moderate blends of hydrotreated renewable jet (HRJ) fuel with Jet A-1 have similar combustion properties to conventional jet fuel, highlighting their suitability as drop-in replacements, while higher blend levels of HRJ fuel, regardless of the crop source, lead to definitive changes in the combustion parameters investigated here.

Original languageEnglish (US)
Title of host publicationCoal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791845653
DOIs
StatePublished - Jan 1 2014
EventASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014 - Dusseldorf, Germany
Duration: Jun 16 2014Jun 20 2014

Publication series

NameProceedings of the ASME Turbo Expo
Volume3A

Other

OtherASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014
CountryGermany
CityDusseldorf
Period6/16/146/20/14

ASJC Scopus subject areas

  • Engineering(all)

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