Plasma radiation for atmospheric entry at Titan: emission spectroscopy measurements and numerical rebuilding

Sobbia, R., Leyland, P., Babou, Y., Potter, D. and Marraffa, L. (2013) Plasma radiation for atmospheric entry at Titan: emission spectroscopy measurements and numerical rebuilding. Journal of Plasma Physics, 79 5: 525-534. doi:10.1017/S0022377812000888


Author Sobbia, R.
Leyland, P.
Babou, Y.
Potter, D.
Marraffa, L.
Title Plasma radiation for atmospheric entry at Titan: emission spectroscopy measurements and numerical rebuilding
Journal name Journal of Plasma Physics   Check publisher's open access policy
ISSN 0022-3778
1469-7807
Publication date 2013-01-21
Year available 2013
Sub-type Article (original research)
DOI 10.1017/S0022377812000888
Open Access Status Not Open Access
Volume 79
Issue 5
Start page 525
End page 534
Total pages 10
Place of publication Cambridge, United Kingdom
Publisher Cambridge University Press
Language eng
Formatted abstract
Emission spectroscopy measurements on a plasma representative of Titan atmosphere composition were obtained in the Inductively Coupled Plasma wind tunnel facility (VKI-Minitorch) at the von Karman Institute in Belgium. Temperatures ranged from 3600 to 5000 K, pressure was fixed at 300 mbar, and the molar composition was 1.9% CH4 and 98.1% N2. The high-pressure plasma was produced to obtain conditions close to equilibrium. In conjunction, line-by-line calculations have been carried out to assess the reliability of two distinct sets of molecular electronic transition moments, recently released, by predicting the radiative signature of high-temperature N2-CH4 plasma. The radiative transfer problem was solved by considering the plasma plume at local thermodynamic equilibrium conditions in an axisymmetric configuration. Comparisons between the synthetic and experimental spectra demonstrated good agreement for the CN Violet and high-wavelength CN Red bands, while some discrepancies were observed for the C2 Swan bands and low-wavelength CN Red bands.
Keyword Diatomic molecules
Co2-N-2 Plasmas
Shock layer
Vehicle
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes First published online: 21 January 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
 
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