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A Study on Charring Rate of Wood Exposed to a Constant Incident Radiation Heat Flux  

Park Hyung-Ju (호서대학교 대학원 안전공학과)
Kim Hong (호서대학교 안전시스템공학과)
Publication Information
Fire Science and Engineering / v.18, no.4, 2004 , pp. 86-92 More about this Journal
Abstract
We tested five specimens of each species at each of five constant external heat flux levels (10, 15, 20, 25. and 35㎾/㎡). An Cone heater was used to expose the wood specimens to the heat flux. The 100-by 100-by 50-㎜ specimens were of four species: Redwood, White oak, Douglas fir, Maple. In result of test, charring of wood exposed to a constant external heat flux can be considered a linear with function of time. As compared with the charring rates Redwood is most rapidly, but on the other hand Douglas fir is most slowly. When the external heat flux is 35㎾/㎡, the charring rate is rapidly about twice then 10㎾/㎡. Using the Equation (2), the estimates for u were 1.02, 1.16, 1.23, 1.32, and 1.44 for the 10, 15, 20, 25, and 35 kw/m2 constant external exposure levels, respectively.
Keywords
Wood; Charring rate; Cone-heater; Redwood; White oak; Douglas fir; Maple;
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