Transient radiative heat transfer from a plasma produced by a capillary discharge

Malay Das, Stefan Thynell, Jianquan Li, Thomas Litzinger

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The objective of this work is to develop a better understanding of the transient behavior of radiative heat transfer from a plasma. The plasma generation occurred within a 3.2-mm-diam and 26-mm-long polyethylene capillary. Because of its high temperature and high pressure, the plasma evolved from the capillary into an ambient air environment as an underexpanded supersonic jet that interacted with a stagnation plate. Various diagnostic techniques were used. They include heat flux and pressure gauges mounted on the stagnation plate, heat flux gauges and silicon photodiodes mounted below the plasma jet, as well as current transducers interfaced with the electrical circuit. The heat flux gauges were manufactured via sputtering and calibrated using a standard convection oven. A fused-silica window, placed about 1 mm above the gauges, ensured that only the radiative heat flux transmitted by the window was deduced. The row of heat flux gauges mounted below the plasma provided an assessment of the fraction of the radiative heat flux transmitted by the fused-silica window. The results show that the peak of emitted radiant flux occurs immediately after the peak of the discharge of electrical energy, which usually occurred a relatively long time prior to arrival of the precursor shock on the stagnation plate.

Original languageEnglish (US)
Pages (from-to)572-580
Number of pages9
JournalJournal of thermophysics and heat transfer
Volume19
Issue number4
DOIs
StatePublished - Jan 1 2005

Fingerprint

radiative heat transfer
heat flux
silicon dioxide
pressure gages
plasma generators
plasma currents
ovens
electric power
plasma jets
photodiodes
arrivals
polyethylenes
transducers
convection
sputtering
shock
air
silicon

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

@article{773b51036682452fbf146feae0e79b34,
title = "Transient radiative heat transfer from a plasma produced by a capillary discharge",
abstract = "The objective of this work is to develop a better understanding of the transient behavior of radiative heat transfer from a plasma. The plasma generation occurred within a 3.2-mm-diam and 26-mm-long polyethylene capillary. Because of its high temperature and high pressure, the plasma evolved from the capillary into an ambient air environment as an underexpanded supersonic jet that interacted with a stagnation plate. Various diagnostic techniques were used. They include heat flux and pressure gauges mounted on the stagnation plate, heat flux gauges and silicon photodiodes mounted below the plasma jet, as well as current transducers interfaced with the electrical circuit. The heat flux gauges were manufactured via sputtering and calibrated using a standard convection oven. A fused-silica window, placed about 1 mm above the gauges, ensured that only the radiative heat flux transmitted by the window was deduced. The row of heat flux gauges mounted below the plasma provided an assessment of the fraction of the radiative heat flux transmitted by the fused-silica window. The results show that the peak of emitted radiant flux occurs immediately after the peak of the discharge of electrical energy, which usually occurred a relatively long time prior to arrival of the precursor shock on the stagnation plate.",
author = "Malay Das and Stefan Thynell and Jianquan Li and Thomas Litzinger",
year = "2005",
month = "1",
day = "1",
doi = "10.2514/1.12861",
language = "English (US)",
volume = "19",
pages = "572--580",
journal = "Journal of Thermophysics and Heat Transfer",
issn = "0887-8722",
publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",
number = "4",

}

Transient radiative heat transfer from a plasma produced by a capillary discharge. / Das, Malay; Thynell, Stefan; Li, Jianquan; Litzinger, Thomas.

In: Journal of thermophysics and heat transfer, Vol. 19, No. 4, 01.01.2005, p. 572-580.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Transient radiative heat transfer from a plasma produced by a capillary discharge

AU - Das, Malay

AU - Thynell, Stefan

AU - Li, Jianquan

AU - Litzinger, Thomas

PY - 2005/1/1

Y1 - 2005/1/1

N2 - The objective of this work is to develop a better understanding of the transient behavior of radiative heat transfer from a plasma. The plasma generation occurred within a 3.2-mm-diam and 26-mm-long polyethylene capillary. Because of its high temperature and high pressure, the plasma evolved from the capillary into an ambient air environment as an underexpanded supersonic jet that interacted with a stagnation plate. Various diagnostic techniques were used. They include heat flux and pressure gauges mounted on the stagnation plate, heat flux gauges and silicon photodiodes mounted below the plasma jet, as well as current transducers interfaced with the electrical circuit. The heat flux gauges were manufactured via sputtering and calibrated using a standard convection oven. A fused-silica window, placed about 1 mm above the gauges, ensured that only the radiative heat flux transmitted by the window was deduced. The row of heat flux gauges mounted below the plasma provided an assessment of the fraction of the radiative heat flux transmitted by the fused-silica window. The results show that the peak of emitted radiant flux occurs immediately after the peak of the discharge of electrical energy, which usually occurred a relatively long time prior to arrival of the precursor shock on the stagnation plate.

AB - The objective of this work is to develop a better understanding of the transient behavior of radiative heat transfer from a plasma. The plasma generation occurred within a 3.2-mm-diam and 26-mm-long polyethylene capillary. Because of its high temperature and high pressure, the plasma evolved from the capillary into an ambient air environment as an underexpanded supersonic jet that interacted with a stagnation plate. Various diagnostic techniques were used. They include heat flux and pressure gauges mounted on the stagnation plate, heat flux gauges and silicon photodiodes mounted below the plasma jet, as well as current transducers interfaced with the electrical circuit. The heat flux gauges were manufactured via sputtering and calibrated using a standard convection oven. A fused-silica window, placed about 1 mm above the gauges, ensured that only the radiative heat flux transmitted by the window was deduced. The row of heat flux gauges mounted below the plasma provided an assessment of the fraction of the radiative heat flux transmitted by the fused-silica window. The results show that the peak of emitted radiant flux occurs immediately after the peak of the discharge of electrical energy, which usually occurred a relatively long time prior to arrival of the precursor shock on the stagnation plate.

UR - http://www.scopus.com/inward/record.url?scp=27844546113&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27844546113&partnerID=8YFLogxK

U2 - 10.2514/1.12861

DO - 10.2514/1.12861

M3 - Article

VL - 19

SP - 572

EP - 580

JO - Journal of Thermophysics and Heat Transfer

JF - Journal of Thermophysics and Heat Transfer

SN - 0887-8722

IS - 4

ER -