Radiative and total heat transfer measurements to a Titan Explorer model

Capra, Bianca and Morgan, Richard G. (2012) Radiative and total heat transfer measurements to a Titan Explorer model. Journal of Spacecraft and Rockets, 49 1: 12-23. doi:10.2514/1.52961

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Author Capra, Bianca
Morgan, Richard G.
Title Radiative and total heat transfer measurements to a Titan Explorer model
Journal name Journal of Spacecraft and Rockets   Check publisher's open access policy
ISSN 0022-4650
Publication date 2012-01
Year available 2011
Sub-type Article (original research)
DOI 10.2514/1.52961
Volume 49
Issue 1
Start page 12
End page 23
Total pages 12
Place of publication American Institute of Aeronautics and Astronautics
Publisher Reston, VA, United States
Collection year 2013
Language eng
Abstract This paper reports on the design and testing of a heat transfer gauge suitable for the spectrum of radiation encountered during entry to the atmosphere of Titan. Experiments were performed on a 70° sphere-cone in the X3 expansion tube at average freestream velocity, pitot pressure, static pressure, and density of 5:83 km=s, 76 kPa, 1.15 kPa, and 2:43 × 10 -3 kg=m 3, respectively. The radiation gauges used thin-film-sensing elements mounted behind a borosilicate window on the windward surface and were therefore shielded from the convective heat transfer. The assembled gauges are uniformly sensitive for radiation in the wavelength range from 0.347 to 2 mand give an integrated measurement of the total radiant flux in this band. Externally mounted thermocouple gauges were used to measure the total heat transfer and the ratio of radiant to the total heat flux found. The Titan atmosphere was simulated by a mixture of 5% methane (by volume) in nitrogen. Comparative tests using pure nitrogen confirmed that, without the methane content, negligible radiation was produced, which is consistent with cyanogen being the primary radiator. Results from this study demonstrate that the gauges and the superorbital expansion tube facility are useful resources for the study of nonequilibrium radiating flows.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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Created: Wed, 14 Mar 2012, 09:28:28 EST by Deanna Mahony on behalf of School of Mechanical and Mining Engineering