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Publication Citation: Flame Suppression Effectiveness (NIST SP 861)

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Author(s): Anthony P. Hamins; G. Gmurczyk; William L. Grosshandler; R. G. Rehwoldt; I Vazquez; Thomas G. Cleary; Cary Presser; K Seshadri;
Title: Flame Suppression Effectiveness (NIST SP 861)
Published: April 01, 1994
Abstract: A flame will be extinguished when the time required for the chain reaction which sustains combustion exceeds the time it takes to replenish the necessary heat and reactants. A characteristic time for reaction can be estimated from the inverse of a global kinetic rate coefficient expressed in Arrhenius form as [equation] where B is a molecular collision frequency factor, Eo is a global activation energy, R is the ideal gas constant, and T is the gas temperature. Assuming reactant species and heat are transported at about the same rate (i.e., unity Lewis number), a characteristic time for replenishing both can be estimated from a convective flow velocity and a length scale by [equation].
Citation: NIST SP - 861
Keywords: halons; fire suppression; effectiveness; diffusion flames; turbulent flames; premixed flames; detonation; chain reactions
Research Areas: Building and Fire Research
PDF version: PDF Document Click here to retrieve PDF version of paper (5MB)