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Modeling of enclosure fires.

Authors
Heskestad-G
Source
Factory Mutual Research Corporation, Norwood, Massachusetts 1972 Aug; :1-28
Link
NIOSHTIC No.
00190685
Abstract
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.
Keywords
NIOSH-Grant; Grants-other; Combustion-products; Fire-hazards; Fire-safety; Safety-research
Contact
None Factory Mutual Res Corp 1151 Boston-Providence Trpk Norwood, Mass 02062
Publication Date
19720801
Document Type
Final Grant Report
Funding Amount
21793
Funding Type
Grant
Fiscal Year
1972
NTIS Accession No.
PB90-129867
NTIS Price
A03
Identifying No.
Grant-Number-R01-OH-00405
NIOSH Division
OEP
Priority Area
Grants-other
Source Name
Factory Mutual Research Corporation, Norwood, Massachusetts
State
MA
Performing Organization
Factory Mutual Research Corporation, Norwood, Massachusetts
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