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Accession Number:
ADA379895
Title:
Droplet Interaction with Hot Surfaces
Descriptive Note:
Annual rept.
Corporate Author:
EN'URGA INC WEST LAFAYETTE IN
Report Date:
1999-01-01
Pagination or Media Count:
6.0
Abstract:
A materials potential fire hazard can be quantified by the rate at which fire spreads over its surface under the influence of forced air convection. If the direction of air flow is the same as the direction of fire propagation, then the fire spread is termed co-current. If the air flow is opposite to the direction of fire spread, it is termed countercurrent. The worst-case scenario in a fire would be purely co-current spread. Consequently, several researchers have studied the rate of fire spread under co-current conditions. A question then arises about fire-spread rate under countercurrent conditions. Fire spread over polymethyl methacrylate PMMA under counter-current air-flow conditions has been studied. The study was carried out with two different thickness 0.0031 m and 0.0063 m of PMMA and four different air-speeds nominally 0.45 ms, 0.75 ms, 1.0 ms and 1.15 ms. The results indicated that the flame-speed is greater over the thinner sample than over the thicker one. PMMA, commonly called plexiglas or acrylic in fire-spread studies, was used in this study because it has well-defined thermodynamic properties like density, specific heat and heat of combustion and leaves behind little solid residue.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
