Code Development to Determine the Temperature from the OH* Chemiluminescence Recordings in a Supersonic Combusting Flow

Sopek, Tamara and Brieschenk, Stefan and Lorrain, Philippe and McIntyre, Timothy J. and Boyce, Russell R. (2014) Code Development to Determine the Temperature from the OH* Chemiluminescence Recordings in a Supersonic Combusting Flow. In: 45th AIAA Plasmadynamics and Lasers Conference (2014), 16 June - 20 June 2014, Atlanta, United States.


Abstract

Experimental investigations of scramjet combustion are the focus of experimental studies performed in T4 facility at The University of Queensland. The objective of the present study is to develop code support to determine OH temperatures in such high speed flows. For this purpose available source codes, namely SPARTAN and Photaura, had to be extended in order to include OH species in their databases. Validation of the OH modelling in SPARTAN and Photaura was done by comparison with the results of LIFBASE simulations. The results of these codes were compared with the OH* chemiluminescence spectra obtained using a Mach 9 enthalpy-equivalent flight condition. A two-dimensional scramjet model with a constant-area supersonic combustor was used in the experimental investigation. The OH* chemiluminescence signal was recorded and the spectrally resolved measurements of the OH* emission spectra have been conducted in order to characterise the ignition and combustion processes. When compared with the spectrally resolved OH* emission spectra, the results of spectral simulations demonstrate a very good agreement. The comparison with the experimental data indicate that results of three synthetic spectral simulation can be considered as a consistent representation of the physical phenomena and can serve as a pre-experiment indication of the combustion process studied. The presented results show the possibility of using OH* chemiluminescence spectra to infer relative temperatures in supersonic combustion. Absolute temperatures can be inferred if the offset between the intensity-versus-temperature functions for OH* and OH is known.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 28 Jul 2022 02:47
Last Modified: 28 Jul 2022 02:47
Uncontrolled Keywords: Combustion pro-cess; Experimental investigations; Relative temperatures; Spectral simulations; Supersonic combustion; Supersonic combustors; Temperature function; University of Queensland
Fields of Research (2020): 40 ENGINEERING > 4001 Aerospace engineering > 400106 Hypersonic propulsion and hypersonic aerothermodynamics
40 ENGINEERING > 4012 Fluid mechanics and thermal engineering > 401205 Experimental methods in fluid flow, heat and mass transfer
51 PHYSICAL SCIENCES > 5102 Atomic, molecular and optical physics > 510203 Nonlinear optics and spectroscopy
Identification Number or DOI: https://doi.org/10.2514/6.2014-2243
URI: http://eprints.usq.edu.au/id/eprint/50497

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