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Author
Klassen, M. | Hamins, A. | Gore, J. P. | Kashiwagi, T.
Title
Heat Flux to the Fuel Surface of a Pool Fire.
Coporate
National Institute of Standards and Technology, Gaithersburg, MD
Sponsor
National Institute of Standards and Technology, Gaithersburg, MD
Contract
NIST-GRANT-60NANB09D0944
Book or Conf
Combustion Institute/Eastern Section. Chemical and Physical Processes in Combustion. Proceedings. Fall Technical Meeting, 1991. October 14-16, 1991, Ithaca, NY, 93/1-4 p., 1991
Keywords
combustion | pool fires | heat flux | mass flux | liquid fires | heat release
Identifiers
mass burning; heat feedback; fuel surface
Abstract
The heat flux to the surface of a pool fire and the mass flux vaporizing from the pool are part of a positive feedback loop. The rate of mass burning depends on the heat feedback from the flame to the fuel surface andthe mass burning rate controls the total heat release and the amount of heat feedback. Heat feedback Q (W) to the pool surface is due to the sum of conduction (Qcond), convection (Qconv), and radiation (Qrad). An energy balance at the fuel surface necessitates that the heat feedback is equal to the energy needed to vaporize the fuel and to overcome heat losses via re-radiation by the fuel surface to the surroundings (Qrerad), increased sensible heat of the liquid pool (Qs), and heat flux to the bottom and sides of the pool burner (Qloss).