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Zone Fire Model JET: A Model for the Prediction of Detector Activation and Gas Temperature in the Presence of a Smoke Layer.


pdf icon Zone Fire Model JET: A Model for the Prediction of Detector Activation and Gas Temperature in the Presence of a Smoke Layer. (3390 K)
Davis, W. D.

NISTIR 6324; 55 p. May 1999.

Sponsor:

National Aeronautics and Space Administration, Washington, DC

Available from:

National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161.
Telephone: 1-800-553-6847 or 703-605-6000;
Fax: 703-605-6900.
Website: http://www.ntis.gov
Order number: PB99-132151

Keywords:

zone models; fire models; gas temperature; smoke layers; ceiling jets; ceiling vents; computer models; draft curtains; experiments; heat detectors; sprinkler activation

Abstract:

The zone model JET is a two-zone, single compartment computer model designed to predict the plume centerline temperature, the ceiling jet temperature and the ceiling jet velocity produced by a single fire plume. The impact on the upper layer due to the presence of draft curtains, ceiling vents and thermal losses to the ceiling are included in the model. Ceiling mounted fusible links and link actuated ceiling vents can be included in the model calculations. The unique feature of this model is that the characteristics of the ceiling jet depend on the depth of the hot layer.