Evolution of plasma species and heat – shield temperatures from Hayabusa Reentry Observation

Kraetzig, Benjamin and Lohle, Stefan and Buttsworth, David (2014) Evolution of plasma species and heat – shield temperatures from Hayabusa Reentry Observation. Journal of Spacecraft and Rockets, 51 (3). pp. 823-837. ISSN 0022-4650

Abstract

Emission signatures of the Hayabusa capsule reentry, acquired by the Australian Ultraviolet Spectrograph instrument on the NASA DC-8 mission over the South Australian Woomera landing site on 13 June 2010, are analysed to identify thermal characteristics of the shock layer and the ablative heat-shield performance. The spectral range 330 to 470 nm of the Australian Ultraviolet Spectrograph instrument contains signatures of the air plasma species nitrogen and the ablation-related species cyanogen. The time-resolved evolution of averaged species number densities, vibrational and rotational plasma temperatures, and the heat-shield surface temperature are deduced through a multiparameter error-minimization analysis based on the European Space Agency plasma radiation database PARADE. The plasma temperatures indicate nonequilibrium conditions for cyanogen at altitudes above 70 km and equilibrium conditions after peak heating. Two separate thermal protection system activity periods are identified by the analysis. Early pyrolysis activity is indicated by a peak in cyanogen and nitrogen – hydrogen emissions at altitudes around 80 km. Broader peaks in the number of cyanogen molecules and reduced nitrogen – hydrogen emissions were identified around the time of peak heating at an altitude of about 57 km and elevated surface temperatures, above 3000 K.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 by the American Institute of Aeronautics and Astronautics, Inc. Permanent restricted access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 18 Feb 2015 11:59
Last Modified: 07 Jul 2016 06:23
Uncontrolled Keywords: reentry temperatures; Hayabusa
Fields of Research : 09 Engineering > 0901 Aerospace Engineering > 090107 Hypersonic Propulsion and Hypersonic Aerodynamics
Socio-Economic Objective: B Economic Development > 88 Transport > 8803 Aerospace Transport > 880399 Aerospace Transport not elsewhere classified
Funding Details:
Identification Number or DOI: 10.2514/1.A32854
URI: http://eprints.usq.edu.au/id/eprint/26631

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