Spectral radiation emitted by kerosene pool fires

Experimental study at reduced-scale of fire spread between electrical cabinets located opposite each other

“…Considering the radiation emitted by the flames of the burning enclosure to be that from a homogeneous and isothermal equivalent medium, the spectral intensity emitted by the radiative source Ia can be given as follows [24]:…”

“…Where o is the wavenumber (cm-1), r is the flame transmittance (-) and I%b (T) is the blackbody intensity at the equivalent flame temperature T (W.m_2.sr_1.cm) [25]. r can be related to the optical thickness of the flame z as proposed in [24] :…”

“…Thus, according to the values of t, the flames of the burning enclosure (BE) can be either optically thick (r~0 and their emission is similar to that of a blackbody) or thin (r ^ 0 and surrounding emission can be partially transmitted through the flame thickness). z can be assessed according to [24] using the following relationship:…”

“…Where is the extinction coefficient at a reference wavenumber o0 (o0= 4000 cm-1 as chosen in [24]) expressed in m-1, a is the non-integer exponent (-) and L the geometrical thickness of the flames (m). The characteristic flame shape of the BE (Fig.…”

“…6). Furthermore, in accordance with [24], fi0 is taken to be 1.74 and 2.1 m-1 and a 1.07 and 1, for L set at 0.6 and 1 m, respectively. t is calculated from Eq.…”