Heat loss to the interior of a free burning vertical PMMA slab and its influence of estimation of heat of pyrolysis

A. K. Kulkarni, C. I. Kim

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Conduction heat transfer into a vertical free burning PMMA (polymethylmethacrylate) slab as a function of time and distance from the leading edge for clear and black PMMA, and its contribution to the known values of heat of pyrolysis were estimated. The heat conduction into the pyrolyzing surface was deduced from the measured temperatures in the interior of burning slabs. The surface conduction heat flux decreased from 14 kW/m2 for clear PMMA and 13 kW/m2 for black PMMA at t=300 s to almost 8 kW/m2 at around t=1000 s and then reached a plateau, indicating a substantial degree of unsteadiness in the early part of combustion of slabs. It is concluded that, when estimating burning rates in numerical calculations one has to be careful in selecting a value for the heat of pyrolysis because of the generally unsteady nature of heat conduction into the solid interior.

Original languageEnglish (US)
Pages (from-to)359-365
Number of pages7
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume106
StatePublished - Dec 1 1989
EventHeat Transfer Phenomena in Radiation, Combustion, and Fires - Philadelphia, PA, USA
Duration: Aug 6 1989Aug 9 1989

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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