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Heat Feedback to the Fuel Surface in Pool Fires.

pdf icon Heat Feedback to the Fuel Surface in Pool Fires. (1051 K)
Hamins, A.; Fischer, S. J.; Kashiwagi, T.; Klassen, M. E.; Gore, J. P.

NIST SP 971; August 2001.

NIST SP 971: "Collected Reports and Publications by the National Institute of Standards and Technology on Heat Flux Gage Calibration and Usage.", 2001.

Combustion Science and Technology, Vol. 97, No. 1-3, 37-62, 1994.

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pool fires; liquid fuels; burning rate; hydrocarbons; heat flux; heat balance; measuring instruments; conductive heat transfer


A series of measurements designed to investigate the heat feedback in pool fires burning liquid fuels are reported. Such measurements are essential for the development and validation of detailed models which predict the burning rate of liquid hydrocarbons and solid polymers. The radial variation of the local radiative and local net heat flux incident on the surface of 0.30 m diameter pool fires were measured. A water-cooled, nitrogen purged, narrow view-angle gauge was developed to measure the radiative flux incident on the fuel surface. Measurements of the mass burning rate in a burner composed of annular rings was used to estimate the local heat feedback. A number of different fuels were studied, yielding flames with a wide range of heat release rates and luminosities. Consideration of the heat balance for a control volume enclosing the liquid pool indicated that radiation was an important component of the heat feedback for non-luminous fires and a dominant component in luminous fires.