Some Source-Dependent effects of unbounded fires

Jet flame heights, lift-off distances, and mean flame surface density for extensive ranges of fuels and flow rates

“…Other authors subsequently employed this same definition of Q* to correlate the flame heights of pool fires [3,33,34]. McCaffrey pointed out that Zukoski, whose main concern was pool fires, took the lead in correlating his data in terms of Q* [3].…”

“…McCaffrey showed it could be used outside the buoyancy and pool fire regimes to correlate H/D over surprisingly broad regimes, including turbulent jet flames. The original correlation was presented as logarithmic plots of H/D against Q* 2/5 [3] and employed the experimental data in [11,24,33,[35][36][37][38][39]. Becker and Liang's data correlation [35] are shown on the present figure, as Q* attained 2·10 7 .…”

Plume Analysis Above Finite Size Fire Sources

“…In order to solve the set of model equations (6-8) analytically, we have utilised the findings of our earlier work pertaining to top hat plume analysis, Gupta et al [12], that the plume width, b, varies according to (10) Where~is an empirical constant. The value of~is not specified a priori in the present case, but wi 11 be determined numerically.…”

“…The value of~is not specified a priori in the present case, but wi 11 be determined numerically. Equat ion (10) decouples the coupled non-linear model equations, so that their solution could easily be obtained. Using this equation, model equations (6-8) can be integrated to obtain centerline temperature (T m) and velocity (u m) as follows:…”

“…This virtual source is located below the actual fire source. George et al [6], Heskestad [7], Hasemi and Tokunaga [8], Cetegen et al [9], and Cox and Chitty [10] have proposed relationships to determine the location of a virtual point source. Each one of these relationships is applicable to a particular set of conditions exprimented upoh.…”