Effects of radiation on NO kinetics in turbulent hydrogen/air diffusion flames

Conference · Tue Jul 01 04:00:00 EDT 1997

OSTI ID:20013358

Sivathanu, Y R; Gore, J P; Laurendeau, N M

The authors describe a coupled radiation and NO kinetics calculation of turbulent hydrogen/air diffusion flame properties. Transport equations for mass, momentum, mixture fraction, enthalpy (sensible + chemical) including gas band radiation, and NO mass fraction are solved. NO kinetics is described by a one step thermal production mechanism. The local temperature is obtained by solving the enthalpy equation taking radiation loss from H{sub 2}O into consideration. Radiation/turbulence and chemical kinetics/turbulence interactions are treated using a clipped Gaussian probability density function (PDF) for the mixture fraction, and a delta PDF for the enthalpy. The source terms in the enthalpy and mass fraction of NO equations are treated using assumed PDF integration over the mixture fraction space. The results of the simulation are compared with existing measurements of the Emission Indices of NO (EINO) in turbulent H{sub 2}/air diffusion flames. The major conclusion of the paper is that coupled turbulence/radiation interactions should be taken into account while computing the EINO.

• Research Organization: Purdue Univ., West Lafayette, IN (US)
• OSTI ID: 20013358
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
AIR
CHEMICAL REACTION YIELD
COMBUSTION KINETICS
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
FLAMES
HYDROGEN
NITRIC OXIDE
RADIANT HEAT TRANSFER
TURBULENT FLOW