Entrainment and Heat Flux of Buoyant Diffusion Flames. Final Report.
Entrainment and Heat Flux of Buoyant Diffusion Flames.
Final Report.
(602 K)
McCaffrey, B. J.; Cox, G.
NBSIR 82-2473; 35 p. February 1982.
Available from:
National Technical Information Service
Order number: PB82-196296
Keywords:
buoyancy; cross correlation; diffusion flames;
entrainment; heat flux; radiation; turbulence; cross
correlation
Abstract:
Measurments of the vertical component of velocity in
buoyant diffusion flames from extended sources by both
cross-correlation and pressure proble techniques
incorporating time-average signal processing appear to
overestimate the transverse size of these systems based
on a heat balance using measured mean flux. By
utilizing measurements of the radiative fraction of the
flames, and forcing a mean flux heat balance, estimates
of the transverse variation of velocity are obtained and
expressions for flame entrainment and convective heat
flux are determined. The use of mean values is seen to
lead to both overestimates as well as underestimates of
total flux due to turbulent transport.
