Major species production by diffusion flames in a two-layer compartment fire environment

A Model For Predicting Concentrations Of Carbon Monoxide In Building Fires

“…In the preceding paper [l], we presented a model for predicting the yields of chemical species for propane fire, in which the yields of a certain number of incomplete combustion products, in addition to the products of complete combustion, which are the same as shown in Figure 1, are assumed. The equations layer concentrations of the chemical species theoretically derived best agree with Beyler's test data [2].…”

“…For propane, well] have found that the parameter values empirically determined as follows exhibit acceptable agreement with Beyler's data [2], a) when @ lS 1 b) when 0 > 1 As we notice by Eqs. (11.11, (11.21, (17.1) and (17.21, the normalized yield of each species is, except oxygen, only a function of equivalence ratio and parameters r, s, PI, p2 and ql, so it follows from the above assumption that these parameters are the same regardless the fuel type, so those for propane can be used for any fuel.…”

“…Beyler [2] conducted experiments for five types of hydrocarbon (C3H8, C3H6, CsH14, C7H8 and CH4), three types of alcohol (CHsOH, CzH50H and C3H,0H) and acetone (C3HsO) as fuels, and concluded that the normalized yield of CO as a function of equivalence ratio for all the fuels examined were qualitatively similar to that found with propane.…”

The Role Of Soot Particle Formation On The Production Of Carbon Monoxide In Fires

“…In order to avoid the need for detailed chemical kinetic modeling of CO and soot in these complex reacting flows, several workers have pursued approaches emphasizing correlations. While some workers [4] have tried to directly correlate their CO and soot data, others [1,2,[6][7][8][9][10] have used the conserved scalar approach to correlate CO production with the local equivalence ratio (These relations are referred to as state relationships). However, since the quantity of soot formed in a fire has been shown to be a function of scale [5], the correlation of CO with soot implies that the CO state relationship depends on scale (i.e.…”

“…In recent years, numerous investigations [1][2][3][4][5][6][7] have focussed on carbon monoxide (CO) production and emission from fires since CO is widely recognized as the most serious combustion product resulting from fires. It is recognized that the high concentrations of CO and soot that characterize typical fire situations [4,5] may be related.…”