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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2558
Title: Ignition of n-propanol-air hydrothermal flames during supercritical water oxidation
Authors: Reddy, Sivamohan N.
Nanda S.
Hegde U.G.
Hicks M.C.
Kozinski J.A.
Published in: Proceedings of the Combustion Institute
Abstract: A novel concept was applied for the in situ study of the ignition of n-propanol-air hydrothermal flames during supercritical water oxidation. An innovative experimental arrangement including NASA's supercritical water oxidation facility was used to invistigate the effect of reactor and oxidant (air) temperature on the spontaneous ignition of hydrothermal flames. New data were obtained regarding time- and temperature-resolved profiles of n-propanol in hydrothermal flames. The optimal reactor temperatures for flame ignition were determined as 380°C (at oxidant temperature of 450°C) and 420°C (at oxidant temperature of 400°C) with 20.7 MPa pressure and 1.5 mL/s oxidant (air) flow rate. The influence of buoyancy on ignition was considered in terms of Froude number. Time delays associated with the flame ignition at near-critical and supercritical environments as well as possible routes towards their diminution were studied. The ignition mechanism of n-propanol-air hydrothermal flames together with the ignition maps is proposed.
Citation: Proceedings of the Combustion Institute (2017), 36(2): 2503-2511
URI: https://doi.org/10.1016/j.proci.2016.05.042
http://repository.iitr.ac.in/handle/123456789/2558
Issue Date: 2017
Publisher: Elsevier Ltd
Keywords: Hydrothermal flames
Ignition delay
n-propanol
Near-critical water
Supercritical water
ISSN: 15407489
Author Scopus IDs: 56923787200
56350215900
7005731796
11439948700
7003265926
Author Affiliations: Reddy, S.N., Department of Earth and Space Science and Engineering, Lassonde School of Engineering, York University, Toronto, ON, Canada, Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Nanda, S., Department of Earth and Space Science and Engineering, Lassonde School of Engineering, York University, Toronto, ON, Canada
Hegde, U.G., Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH, United States
Hicks, M.C., Glenn Research Center, National Aeronautics and Space Administration (NASA), Cleveland, OH, United States
Kozinski, J.A., Department of Earth and Space Science and Engineering, Lassonde School of Engineering, York University, Toronto, ON, Canada
Funding Details: The authors would like to thank Natural Sciences and Engineering Research Council of Canada (NSERC) for proving funding to conduct this emerging area of research. The technical assistance from NASA and support from the Lassonde School of Engineering are greatly appreciated.
Corresponding Author: Kozinski, J.A.; Department of Earth and Space Science and Engineering, Lassonde School of Engineering, York UniversityCanada; email: janusz.kozinski@lassonde.yorku.ca
Appears in Collections:Journal Publications [CH]

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