
286 Oxygen-Enhanced Combustion
reliable. However, none of the studies gave an esti-
mate of the uncertainty in the measurements. In most
cases, a complete set of data has not been given for
a specic heat ux measurement. Commonly, a range
of values or an average value for a particular vari-
able has been given. No specic relationship, between
those temperatures and the reported heat uxes, was
given. In the sample calculations, an average value of
2000K (3100°F) was used. Another possible source of
error, in the calculations, is the choice of β
s
. In most
cases, Equation 7.11 for a sphere has been used, in
the absence of an equation for a h