Molecular transport effects in turbulent diffusion flames at moderate Reynolds number

Conference · Thu Jan 01 00:00:00 EST 1981 · AIAA Pap.; (United States)

OSTI ID:5168379

Bilger, R W

In flames molecular diffusivities are enhanced by the high temperatures and can be of the same order as turbulent diffusivities in flames of moderate Reynolds number. A perturbation analysis is used to quantify differential diffusion effects in a hydrogen/air diffusion flame which arise from differential molecular diffusivities. The analysis uses perturbations about the equal diffusivity, adiabatic, equilibrium theory commonly used and yields solutions for the average and higher moments for the departures in normalized element mass fractions and enthalpy. The results are compared with the laser-Raman measurements of M.C. Drake et al. in a relatively low Reynolds number flame. 24 refs.

• Research Organization: Univ of Sydney, NSW, Aust
• OSTI ID: 5168379
• Report Number(s): CONF-810106-
• Journal Information: AIAA Pap.; (United States), Conference: 19. Aerospace Sciences meeting, St Louis, MO, USA, 12 Jan 1981
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
FLAMES
TURBULENCE
HYDROGEN
COMBUSTION KINETICS
AIR
DIFFUSION
FLAME PROPAGATION
REYNOLDS NUMBER
TURBULENT FLOW
CHEMICAL REACTION KINETICS
ELEMENTS
FLUID FLOW
FLUIDS
GASES
KINETICS
NONMETALS
REACTION KINETICS
080800* - Hydrogen- Properties & Composition