Appearance, temperature, and NOx emission of two inverse diffusion flames with different port design

Control of the structure and sooting characteristics of a coflow laminar methane/air diffusion flame using a central air jet: An experimental and numerical study

“…The nucleation and growth rate constants used in the present calculations were taken from a previous study [27]. The density of soot q C(S) is taken to be 1.9 g/cm 3 . It is noted that the soot surface growth rate is assumed here to be proportional to the square root of the soot surface area based on the recommendation of Leung et al [32].…”

“…These burners offer the flexibility to aerodynamically control the flame shape, combustion process, and pollutant emissions by varying the velocity and compositions of individual fluid streams to achieve the optimal performance. Several experimental studies have been carried out to investigate the effects of burner design on radiation heat output, flame appearance, NO x emission, and/or CO and unburned hydrocarbon emissions [1][2][3][4].I ti s worth pointing out that the key features in these novel burner designs are to take advantage of the properties of inverse diffusion flame by introducing an air stream inside the fuel jet, the properties of partially premixed flame by mixing the fuel stream with air or combustion products, and the stability of normal diffusion flames. However, the flames investigated in most of such studies are large in size and turbulent; therefore, they do not permit multidimensional numerical simulations using detailed combustion chemistry to gain fundamental understanding of the effect of flow field on the combustion processes and interactions between multiple reaction zones.…”

Thermal and Pollutant-Emission Characteristics of Inverse Diffusion Biogas/Air Flame

“…Ng and Leung [6] also experimentally tested the heat transfer of an impinging inverse diffusion flame. Besides, Sze et al [7] and Zhen et al [8] studied the pollutant emission characteristics Thermal and Pollutant-Emission Characteristics of Inverse Diffusion Biogas/Air Flame Lei Lyu, Liang An, and Chun Wah Leung for inverse diffusion flame and premixed flame respectively, and concluded that pollutant emissions were affected by Reynolds number, equivalence ratio and nozzle-to-plate distance for both flame types.…”

Flame Structure and Chemiluminescence Emissions of Inverse Diffusion Flames under Sinusoidally Driven Plasma Discharges

“…In presence of high air jet velocity, the fuel of the outer jet is entrained inward and mixes with the air, leading to a partially premixed flame. If not, it burns as a diffusive flame [8].…”