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Algorithm for Estimating the Plume Centerline Temperature and Ceiling Jet Temperature in the Presence of a Hot Upper LayerThe experiments were designed to provide insight into the behavior of jet fuel fires in aircraft hangars and to study the impact of these fires on the design and operation of a variety of fire protection systems. As a result, the test series included small fires designed to investigate the operation of UV/IR detectors and smoke detectors as well as large fires which were used to investigate the operation of ceiling mounted heat detectors and sprinklers. The impact of the presence or absence of draft curtains was also studied in the 15 m hangar. It is shown that in order to predict the plume centerline temperature within experimental uncertainty, the entrainment of the upper layer gas must be modeled. For large fires, the impact of a changing radiation fraction must also be included in the calculation. The dependence of the radial temperature profile of the ceiling jet as a function of layer development is demonstrated and a ceiling jet temperature algorithm which includes the impact of a growing layer is developed.
Document ID
19980227110
Acquisition Source
Headquarters
Document Type
Preprint (Draft being sent to journal)
Authors
Davis, William D.
(National Inst. of Standards and Technology Gaithersburg, MD United States)
Notarianni, Kathy A.
(National Inst. of Standards and Technology Gaithersburg, MD United States)
Tapper, Phillip Z.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1998
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
NISTIR-6178
PB98-146152
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
ALGORITHMS
COMPUTER MODELS
HANGERS
FIRE TESTS
PLUMES
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