Supersonic combustion of hydrogen in Mach 2 flows over an axisymmetric model

Zhao, Mengmeng and Buttsworth, David and Choudhury, Rishabh (2018) Supersonic combustion of hydrogen in Mach 2 flows over an axisymmetric model. In: 22nd AIAA International Space Planes and Hypersonics Systems and Technologies Conference (AIAA 2018-5252), 17-19 Sept 2018, Orlando, Florida, USA.


Abstract

An external axisymmetric model featuring a cavity flame-holder fuelled by hydrogen was adopted for the study of the supersonic combustion in Mach 2 flows. The self-sustained hydrogen flames ignited by a spark gap igniter were detected using two optical techniques: an intensified camera attachment coupled with a high speed camera with a narrow-band-pass filter centred at 310 nm for detection of OH* chemiluminescence; and high-speed schlieren imaging for flow visualization. The spark ignition was identified on the schlieren images which also enabled visualisation of changes in the flow structure associated with the combustion. Local concentrations of the radiating radical OH* were determined using the inverse Abel transformation based on the ICCD images and calibration against a light source of known radiance. The combustion flow was reconstructed numerically using a CFD Solver, Eilmer4 in an axisymmetric configuration coupled with a detailed H2/O2 oxidation chemistry mechanism and a OH* chemiluminescence sub-scheme. The maximum magnitude of the results for the OH* chemiluminescence simulations demonstrated reasonable agreement with measurements.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: Published online: 15 sept 2018. Permanent restricted access to Online Published paper, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Date Deposited: 14 Jan 2020 00:38
Last Modified: 11 Feb 2020 03:27
Uncontrolled Keywords: bandpass filters, chemiluminescence, computational fluid dynamics, high speed cameras, hydrogen, light sources, visualization
Fields of Research (2008): 09 Engineering > 0901 Aerospace Engineering > 090107 Hypersonic Propulsion and Hypersonic Aerodynamics
Identification Number or DOI: https://doi.org/10.2514/6.2018-5252
URI: http://eprints.usq.edu.au/id/eprint/34828

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