Numerical Analysis of NOx Formation in Hydrogen Laminar Jet Diffusion Flames.

Soot Formation in Laminar Diffusion Flames

Laminar, sooting, coflow diffusion flames at atmospheric pressure have been studied experimentally and theoretically as a function of fuel dilution by inert nitrogen. The flames have been investigated with laser diagnostics. Laser extinction has been used to calibrate the experimental soot volume fractions and an improved gating method has been implemented in the laser-induced incandescence (LI...

Laminar Smoke Points of Nonbuoyant Jet Diffusion Flames

The laminar smoke point properties of jet diffusion f lames-the luminous flame length, the residence time, and the fuel flow rate, at the onset of soot emission from the flames--have proven to be useful global measures of the soot properties of nonpremixed flames. These measures provide a means to rate several aspects of sooting properties: the relative tendency of various fuels to emit soot fr...

Modeling soot formation in turbulent kerosene/air jet diffusion flames

Soot volume fraction and number density in a turbulent diffusion flame burning kerosene/air were predicted using two approaches. The first used a conventional soot inception model based on the acetylene concentration and is referred to as the acetylene model. The second used a soot inception model based on the formation rate of three and two ring aromatics [1] and is referred to as the PAH ince...

Ammonia Conversion and NOx Formation in Laminar Coflowing Nonpremixed Methane-Air Flames

This paper reports on a combined experimental and modeling investigation of NOx formation in nitrogen-diluted laminar methane diffusion flames seeded with ammonia. The methane-ammonia mixture is a surrogate for biomass fuels which contain significant fuel-bound nitrogen. The experiments use flue-gas sampling to measure the concentration of stable species in the exhaust gas, including NO, O2, CO...

AlAA 94-0428 Soot Nucleation and Growth in Weakly-Buoyant Laminar Jet Diffusion Flames