Example $7\mathrm{.}2$ Estimate the flame height of a laminar propane jet flame at $P=1$atm and $T_f=T_{\text{a}\text{i}\text{r}}=300K.$ The mass flow rate of fuel is $2\mathrm{.}7*{10}^{-6}k\frac{g}{s}$ and the density of propane is $1\mathrm{.}8k\frac{g}{m^3}.$ The flame temperature is assumed to be $2,400K$ and the mean diffusivity is $2\mathrm{.}84*{10}^{-5}\frac{m^2}{s}.$