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Chemical Kinetics of n-Hexane-Air Atmospheres in the Boundary Layer of a Moving Hot Sphere

Mével, Rémy and Niedzielska, Urszula and Melguizo-Gavilanes, Josué and Coronel, Stephanie A. and Shepherd, Joseph E. (2016) Chemical Kinetics of n-Hexane-Air Atmospheres in the Boundary Layer of a Moving Hot Sphere. Combustion Science and Technology, 188 (11-12). pp. 2267-2283. ISSN 0010-2202. https://resolver.caltech.edu/CaltechAUTHORS:20161107-081612074

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Abstract

The present article focuses on the chemical kinetics of the ignition of premixed n-hexane-air atmospheres by a moving hot sphere with emphasis on the role of low-temperature chemistry (T < 1000 K). Experiments were performed to measure the minimum surface temperature for ignition of a propagating flame and nonreactive two-dimensional simulations were performed to estimate the temperature a parcel of fluid experiences as it travels within the thermal boundary layer near the surface of the sphere. Reactive simulations using detailed reaction models and a one-step model were used to investigate the chemical reaction dynamics in a constant pressure reactor with a variable heat transfer coefficient, which reproduces the temperature history. It was found that, under the specific conditions studied, the chemistry is activated at T > 1000 K with no noticeable impact of the low-temperature chemical pathways.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1080/00102202.2016.1211886DOIArticle
ORCID:
AuthorORCID
Mével, Rémy0000-0002-0032-350X
Melguizo-Gavilanes, Josué0000-0001-5174-6003
Coronel, Stephanie A.0000-0002-7088-7976
Shepherd, Joseph E.0000-0003-3181-9310
Additional Information:© 2016 Informa Group plc. Received 23 Nov 2015, Accepted 01 Apr 2016, Published online: 28 Oct 2016. The present work was performed at the Explosion Dynamics Laboratory of the California Institute of Technology and was partly supported by The Boeing Company through a Strategic Research and Development Relationship Agreement CT-BA-GTA-1 with Arthur Day as a technical monitor. Urszula Niedzielska is grateful to Polish-U.S. Fulbright Commission for sponsoring her stay at Caltech as a Visiting Special Student. Josué Melguizo-Gavilanes is grateful to the Natural Sciences and Engineering Research Council of Canada (NSERC) for providing a Postdoctoral Fellowship.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Boeing Company Strategic Research and Development RelationshipCT-BA-GTA-1
Fulbright CommissionUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Subject Keywords:Aircraft safety, Hydrocarbon ignition, Moving hot surface
Issue or Number:11-12
Record Number:CaltechAUTHORS:20161107-081612074
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20161107-081612074
Official Citation: Rémy Mével, Urszula Niedzielska, Josué Melguizo-Gavilanes, Stephanie Coronel & Joseph E. Shepherd (2016) Chemical Kinetics of n-Hexane-Air Atmospheres in the Boundary Layer of a Moving Hot Sphere, Combustion Science and Technology, 188:11-12, 2267-2283, DOI: 10.1080/00102202.2016.1211886
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71755
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Nov 2016 20:13
Last Modified:25 Aug 2020 17:35

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