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Time history of flame shape in pool fires and influence of fuel temperature

Zeitliche Änderung des Flammenkörpers von Pool Fire and Einfluß der Brennstofftemperatur
: Weiser, V.; Weindel, M.; Franchin, I.

Eckl, W. ; Fraunhofer-Institut für Chemische Technologie -ICT-, Pfinztal:
Combustion and detonation
Pfinztal: ICT, 1997 (Proceedings of the International Annual Conference of ICT 28)
ISSN: 0722-4087
Fraunhofer-Institut für Chemische Technologie (Internationale Jahrestagung) <28, 1997, Karlsruhe>
Fraunhofer-Institut für Chemische Technologie (International Annual Conference) <28, 1997, Karlsruhe>
Conference Paper
Fraunhofer ICT ()

Small-scale pool fires of MeOH, nitromethane, i-PrOH, and isooctane were studied using a video system and an image-analyzing software to test whether simplifications (const. flame shape, temp., and surface emissive power) in general made for the estn. of safety distances between storage tanks in the case of hazardous fires are justifiable. The fires showed quasi-periodic ascending flame structures with const. surface emissive power in time intervals of 100-200 ms. These structures ascend higher with increasing frequency as the fuel temp. increases. A strong decrease of the flame height with increasing O content of the fuel was also found. The short-time history of the total emitted heat depends mainly on the flame shape. To est. the max. radiation on a target it is proposed to use a flame geometry of a ball ascending with increasing radius.