Jet fuel ignition variability : constant volume spray and shock tube experiments
Authors
Burden, Sean
ORCID
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Other Contributors
Oehlschlaeger, Matthew A.
Anderson, Kurt S.
Borca-Tasçiuc, Theodorian
Anderson, Kurt S.
Borca-Tasçiuc, Theodorian
Issue Date
2017-05
Keywords
Mechanical engineering
Degree
MS
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
Full Citation
Abstract
Ignition delay times for conventional and alternative jet and diesel fuels of interest to the United States Department of Defense were measured in a constant volume spray combustion chamber and a shock tube in homogenous gas-phase reflected shock experiments. Experiments were performed in the spray environment for spray of fuel into hot air at 1, 2.14, and 4 MPa pressure and 620-830 K. Shock tube experiments were performed for homogenous stoichiometric fuel/air mixtures at pressures of 20, 40, and 80 atm and for 660-1310 K. These experiments characterize the relative reactivity of the fuels, the dependence of reactivity on temperature and pressure, and correlate reactivity between the spray and homogenous gas-phase environments. Important results include three observed temperature regimes in the shock tube experiments and observed increased pressure dependence in the negative-temperature-coefficient (NTC) regime in both the shock tube and spray ignition experiments. The spray experiments show decreasing temperature dependence as the temperature increases from the low-temperature regime towards the entrance of the NTC. The fuel reactivity trends measured with the derived cetane number (DCN) in the spray experiments correlate in a power law relationship with ignition delay measured in the shock tube in the NTC, indicating DCN is a measure of NTC gas-phase chemical kinetic reactivity. The experimental database reported here should be valuable for the future development of chemical kinetic models for jet and diesel fuels.
Description
May 2017
School of Engineering
School of Engineering
Department
Dept. of Mechanical, Aerospace, and Nuclear Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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