- Author
-
Lattimer, B. Y.
|
Ganeshan, B.
- Title
- Model for Estimating Combustion Product Composition in Compartment Fires.
- Coporate
- Virginia Polytechnic Institute and State Univ., Blacksburg
- Sponsor
- National Institute of Standards and Technology, Gaithersburg, MD
- Contract
- NIST-CONTRACT-60NANB4D1651
- Book or Conf
- Chemical and Physical Processes in Combustion. Fall Technical Meeting, 1996. Proceedings. Combustion Institute/Eastern States Section. December 9-11, 1996,
Hilton Head, SC,
175-178 p.,
1996
- Keywords
-
combustion
|
compartment fires
|
combustion products
|
flashover
|
hexane
|
methane
|
global equivalence ratio
- Abstract
- The estimation of species concentrations in the upper-layer of compartment fires is important in assessing whether conditions within the compartment are hazardous to people near the burning room. It has been established that the highest levels of incomplete combustion products are present in the compartment upper-layer after the onset of flashover. An engineering tool is developed in this paper to provide an estimate of the species concentrations in the compartment upper-layer during post-flashover. The phenomenological compartment fire model developed herein is basically a homogeneous reactor at a uniform temperature. The two inputs into the model are the global equivalence ratio, GER, (defined as the moles of fuel divided by the moles of air all normalized by the stoichiometric fuel-to-air ratio) and the upper-layer temperature during the steady-state period of the fire. The unique aspect of the model is, however, the assignment of the initial boundary conditions (i.e. the initial species concentrations) in the reactor. With the GER less than 0.9, the species concentrations in the upper-layer were estimated using equilibrium calculations.