A streamlined approach to hybrid-chemistry modeling for a low cetane-number alternative jet fuel

The development of renewable, alternative jet fuels presents an exigent challenge to the aviation community. In this work, a streamlined methodology for building computationally efficient kinetic models of real fuels from shock tube experiments is developed and applied to a low cetane-number, broad-...

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Bibliographic Details
Published in:Combustion and flame 2019-10, Vol.208, p.15-26
Main Authors: Pinkowski, Nicolas H., Wang, Yu, Cassady, Séan J., Davidson, David F., Hanson, Ronald K.
Format: Article
Language:English
Subjects:
Aviation fuel
Combustion chambers
Computer simulation
Convex optimization
Delay time
Hexadecane
High temperature
Jet engine fuels
Jet fuel
Kinetic model
Laser absorption spectroscopy
Optimization
Organic chemistry
Pyrolysis
Shock tube
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Summary:The development of renewable, alternative jet fuels presents an exigent challenge to the aviation community. In this work, a streamlined methodology for building computationally efficient kinetic models of real fuels from shock tube experiments is developed and applied to a low cetane-number, broad-boiling alternative jet fuel (termed C-4). A multi-wavelength laser absorption spectroscopy technique was used to determine species time-histories during the high-temperature pyrolysis of C-4, and a batch gradient descent optimization routine built a hybrid-chemistry (HyChem) kinetic model from the measured data. The model was evaluated using combustor-relevant, high-pressure ignition delay time measurements with satisfactory agreement. The present model enables predictive simulations of C-4 in practical environments, while the underlying methodology described here can be readily extended to build kinetic models for a broad range of real fuels of interest.
ISSN:0010-2180
1556-2921
DOI:10.1016/j.combustflame.2019.06.024