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Temperature effects on the mass flow rate in the SBI and similar heat‐release rate test equipment
Author(s) -
Sette Bart J. G.,
Theuns Erwin,
Merci Bart,
Vandevelde Paul
Publication year - 2006
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.925
Subject(s) - mass flow rate , mechanics , combustion , volumetric flow rate , mass flow meter , mass flow , pitot tube , duct (anatomy) , thermal mass flow meter , flow measurement , flow (mathematics) , chemistry , materials science , physics , medicine , organic chemistry , pathology
In various medium‐to‐large‐scale fire test equipments like the ISO room corner test (RC), and more recently, the single burning item test (SBI) the mass flow rate measurement of the combustion gases plays a key role in the determination of the heat‐release rate and smoke‐production rate. With the knowledge of the velocity profile and the temperature of the flow, the mass flow rate is obtained by measuring the velocity on the axis of the duct. This is done by means of a bi‐directional probe based on the pitot principle. However, due to the variation of the mean temperature and the temperature gradient in any cross section of the duct, introduced by ever changing combustion gas temperatures, the velocity nor the density profile are constant in time. This paper examines the resulting uncertainty on the mass flow rate. Copyright © 2006 John Wiley & Sons, Ltd.