Analysis of an active high-temperature thermal insulation system

S. Maruyama, R. Viskanta, T. Aihara

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


An active thermal insulation system consisting of a semitransparent porous medium with gas injection is considered for protecting a structure from intense radiation flux (≈5 MWm-2). The dependence of the thermophysical properties on temperature and dissociation are taken into account. Air, hydrogen, and dissociating ammonia are considered as representative gases. The effects of dissociating and nondissociating gases on temperature distributions in the gas and solid are examined. The active insulation system reduces the thermal penetration depth as little as a few millimeters in thickness. The present protection system is most effective when the advection-radiation parameter Nc/NR is larger than 1 or 2.

Original languageEnglish
Pages (from-to)196-203
Number of pages8
JournalInternational Journal of Heat and Fluid Flow
Issue number3
Publication statusPublished - 1990 Sep


  • gas injection
  • high temperature
  • insulation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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