Two-dimensional conduction effects in estimating radiative heat flux from a plasma jet

Malay Das, Stefan Thynell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

It is quite common to employ thin metallic films for the determination of heat transfer rates at a fluid-solid interface. Depending on the duration of the event and gage design, it may be important to account for multi-dimensional heat conduction within the substrate of the thin film. The objective of this work is to assess the effects of two-dimensional heat conduction on the deduced radiative heat fluxes using a conjugate-gradient based inverse algorithm. For comparison, a previously developed one-dimensional inverse technique is also used. The high heat fluxes are produced by an electrothermal-chemical plasma jet. The plasma, initiated within a 3.2 mm diameter and 26 mm long polyethylene capillary by exploding a 3.6 mg thin copper wire, emerges into an open-air atmosphere as a high-temperature, high-pressure, underexpanded supersonic jet. The jet impinges over a stagnation plate equipped with thin-film sputtered platinum heat-flux gages, whose temperature history serves as an input to the heat-flux estimation algorithm. Four different charging voltage levels are investigated, ranging from 2.5 to 7.5kV. While both algorithms capture the temporal variations of the radiative heat fluxes, two-dimensional heat conduction model reveals the discrepancies between the two techniques as well as the range of applicability of the one-dimensional model.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings
Pages1101-1113
Number of pages13
StatePublished - Dec 21 2006
Event9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings - San Francisco, CA, United States
Duration: Jun 5 2006Jun 8 2006

Publication series

NameCollection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings
Volume2

Other

Other9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings
CountryUnited States
CitySan Francisco, CA
Period6/5/066/8/06

Fingerprint

Plasma jets
Heat flux
Heat conduction
Thin films
Gages
Metallic films
Polyethylenes
Platinum
Wire
Heat transfer
Copper
Plasmas
Temperature
Fluids
Electric potential
Substrates

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Das, M., & Thynell, S. (2006). Two-dimensional conduction effects in estimating radiative heat flux from a plasma jet. In Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings (pp. 1101-1113). (Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings; Vol. 2).
Das, Malay ; Thynell, Stefan. / Two-dimensional conduction effects in estimating radiative heat flux from a plasma jet. Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. 2006. pp. 1101-1113 (Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings).
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Das, M & Thynell, S 2006, Two-dimensional conduction effects in estimating radiative heat flux from a plasma jet. in Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings, vol. 2, pp. 1101-1113, 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings, San Francisco, CA, United States, 6/5/06.

Two-dimensional conduction effects in estimating radiative heat flux from a plasma jet. / Das, Malay; Thynell, Stefan.

Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. 2006. p. 1101-1113 (Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings; Vol. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Das M, Thynell S. Two-dimensional conduction effects in estimating radiative heat flux from a plasma jet. In Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. 2006. p. 1101-1113. (Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings).