- Author
-
Bromberg, K.
|
Quintiere, J. G.
- Title
- Radiative Heat Transfer from Products of Combustion in Building Corridor Fires. Final Report.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Report
-
NBSIR 74-596,
February 1975,
26 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
combustion products
|
large scale fire tests
|
radiative heat transfer
- Abstract
- The contribution of radiative heat transfer from hot combustion products to corridor floors is examined. Data from full-scale corridor fire experiments is used to calculate emissivity and absorptivity of the combustion products. An empirical model based on attenuation by absorption is used to specify the absorption coefficient due to particulates in the products. In these experiments it is shown that radiation from the combustion products is just as significant as calculations show that the ratio of radiant heat transfer to the floor due to ceiling emission to that by combustion product emission ranges from about 0.2 to 0.7. Also, molecular gas radiation and particulate radiation can both be significant for the combustion products. Calculations show that the emissivity of the gaseous combustion products alone would be about 0.3, but the inclusion of soot particles yields an emissivity for the total combustion product mixture of as high as 0.73, based on the experimental data considered.