Fire protection research for DOE facilities: FY 83 year-end report

Several fluid dynamic processes which play important roles in the development of accidental fires in structures are discussed.They include a review of information concerning the characteristic flow regimes of fire plumes and the properties of the flow in these regimes, and a brief review of flow through openings and in ceiling jets. Factors which lead to the development of thermal stratification in ceiling layers are also discussed.

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Temperature Profiles In Forced-Ventilation Enclosure Fires

Backovsky¹,

Foote²,

Alvares³

1989

Fire Safety Science - Proceedings of the 2nd International Symp

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We investigated the effect of ventilation rate, ventilation configuration, fire elevation, and the presence of a plenum (suspended ceiling) on the fire compartment temperatures during forced ventilated methane gas fires (100-400 kW). We found that with low air-inlet positions, fires with ventilation rates greater than 2-3 times the stoichiometrically required air (referred to here as well-ventilated fires) produce twolayer temperature profiles; fires with a lower ventilation rate (underventilated fires) produce single-layer profiles with a temperature gradient. Higher temperatures throughout the enclosure are seen in underventilated fires as compared to well-ventilated fires. We observed that high air-inlet locations perturb the two-layer temperature profile of the well-ventilated fire, cooling the upper layer and heating the lower layer. For underventilated fires, high air-inlet locations lower temperatures in the enclosure but do not perturb the profile shape. Elevated fires and fires in a compartment with a plenum were seen to behave similarly for the same distance from fire base to ceiling, producing hotter layers the shorter the distance.

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Fire protection research for DOE facilities: FY 83 year-end report

Cited by 4 publications

References 5 publications

Burning Behavior in a Poorly-Ventilated Compartment Fire -Ghosting Fire-

Burning Behavior in a Poorly-Ventilated Compartment Fire -Ghosting Fire-

Fluid Dynamic Aspects Of Room Fires

Temperature Profiles In Forced-Ventilation Enclosure Fires

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