Radiative Heat Transfer Measurements of Titan Atmospheric Entry in a Shock Tube

Article


Sopek, Tamara, Glenn, Alex, Clarke, Justin, di Mare, Luca, Collen, Peter and McGilvray, Matthew. 2024. "Radiative Heat Transfer Measurements of Titan Atmospheric Entry in a Shock Tube." Journal of Thermophysics and Heat Transfer. https://doi.org/10.2514/1.T6918
Article Title

Radiative Heat Transfer Measurements of Titan Atmospheric Entry in a Shock Tube

ERA Journal ID5155
Article CategoryArticle
AuthorsSopek, Tamara, Glenn, Alex, Clarke, Justin, di Mare, Luca, Collen, Peter and McGilvray, Matthew
Journal TitleJournal of Thermophysics and Heat Transfer
Number of Pages23
Year2024
PublisherAmerican Institute of Aeronautics and Astronautics
Place of PublicationUnited States
ISSN0887-8722
1533-6808
Digital Object Identifier (DOI)https://doi.org/10.2514/1.T6918
Web Address (URL)https://arc.aiaa.org/doi/10.2514/1.T6918
Abstract

Measurements were performed in the T6 Stalker facility operating in Aluminum Shock Tube mode for conditions
relevant to Titan entry. Spatially and spectrally resolved radiation emitted from a high-temperature test gas behind a
normal shock was recorded by means of emission spectroscopy. For Titan atmospheric entry, the main radiator of
interest is cyano radical, formed in the nonequilibrium region behind the shock. The tests reported in this work
measured radiation at velocities from 3.1 to 8.5 km/s and freestream pressures of 13, 20, and 133 Pa at a nominal
composition of 98% N2 and 2% CH4. These shock layer radiation experiments employed an optical emission
spectroscopy system on each side of the facility to allow two spectral regions to be measured simultaneously for
each test, covering the spectral range of 200–900 nm. The present work provides a new, comprehensive benchmark set
of data relevant to Titan entry studies.

Keywordsshock tube, radiation, Titan, hypersonics, spectroscopy
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020400106. Hypersonic propulsion and hypersonic aerothermodynamics
510804. Quantum optics and quantum optomechanics
510203. Nonlinear optics and spectroscopy
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Byline AffiliationsUniversity of Oxford, United Kingdom
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