Modeling of Enclosure Fires

Details

• Personal Author:
  Heskestad G
• Description:
  A proposal was made for an approximate modeling technique for enclosure fires based on the hypothesis that the combustion of a fuel pile in an enclosure depended on associated differences in the fluid mechanical properties and the chemical composition of the gas supply to the fire. Earlier work concerning unconfined fires of wood cribs was reviewed. Under the assumption of large Grashof numbers for the convective flow, application of the modeling hypothesis resulted in the following sufficiency conditions for predicting fire properties on one enclosure scale from experiments on another scale: the enclosures must be geometrically similar; unconfined burning rates of the fuel piles in the two enclosures must be in the ratio of the linear scale ratio to the 5/2 power; porosities of the fuel piles must be conserved from one scale to the other; and the thermal properties of the walls must be modeled for proper thermal response. The third and fourth conditions were not satisfied by experiments available for testing the modeling technique. However, data on burning rates, selected gas species and overall fire behavior conformed well with the modeling hypothesis. Probably due to the fact that wall properties had not been modeled, temperatures did not conform. [Description provided by NIOSH]
• Subjects:
  Fires Occupational Health Safety
• Keywords:
  Combustion-products Fire-hazards Fire-safety Grants-other NIOSH-Grant Safety-research
• Series:
  Grant Final Reports
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  Massachusetts ; OSHA Region 1
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-28
• NIOSHTIC Number:
  nn:00190685
• NTIS Accession Number:
  PB90-129867
• Citation:
  Factory Mutual Research Corporation, Norwood, Massachusetts 1972 Aug; :1-28
• Contact Point Address:
  None Factory Mutual Res Corp 1151 Boston-Providence Trpk Norwood, Mass 02062
• Federal Fiscal Year:
  1972
• NORA Priority Area:
  Grants Other
• Performing Organization:
  Factory Mutual Research Corporation, Norwood, Massachusetts
• Peer Reviewed:
  False
• Start Date:
  19720201
• Source Full Name:
  Factory Mutual Research Corporation, Norwood, Massachusetts
• End Date:
  19720430
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3ad0ab3aad3eac9d3eb6f4b00c8acf5b1b827b986bcd029e85146148f8341fc9a293dad736d93687cc9a3d0790b0ebe5109f311d15363ed30c14a539d17282f1
• Download URL:
  https://stacks.cdc.gov/view/cdc/217769/cdc_217769_DS1.pdf
• File Type:
  [PDF - 836.84 KB ]