Experimental and theoretical study on the flow, mixing, and combustion characteristics of dimethyl ether, methane, and LPG jet diffusion flames

Numerical investigation on the combustion characteristics of methane/air in a micro-combustor with a hollow hemispherical bluff body

“…Aiming at solving the existing problem of the micro-scale combustor, Kang et al [5] studied on the flow, mixing and combustion characteristics of methane. Heat release from combustion has a significant impact on micro-scale combustor.…”

Effect of H2 addition on combustion characteristics of dimethyl ether jet diffusion flame

“…However with respect to the turbulent jet flames, the effective diffusion coefficient can be significantly intensified by eddy mixing. The non-premixed jet flame length was often defined as the axial distance from the burner exit to the intersection point of the flame axis and the stoichiometric contour [35]. Furthermore, this flame length defined as above was proportional to the reaction zone length.…”

“…V R is defined as the volume between the inner and outer 0.0005-X OH iso-surfaces. In this part, considering the quasi-ellipsoidal geometry of the jet diffusion flames, the volumes enclosed by the inner and outer 0.0005-X OH iso-surfaces were approximately calculated as V = pLW 2 /6 [35]. 9b indicates that W R decreased linearly with H 2 addition throughout, regardless of the combustion regime (i.e.…”

“…For example, the pilot flame in the furnace in which the fuel is introduced into the oxidizing environment in the form of a jet. A previous study [35] indicated that the coal-derived DME was a promising alternative fuel for the replacement of natural gas (NG) and LPG, by comparing their economical efficiencies and availabilities. However, the blow-out fuel jet velocity of the DME jet diffusion flame was considerably lower than that of the methane flame, although the DME jet flame emitted less soot in comparison with methane.…”

A mathematical model for flame volume estimation based on flame height of turbulent gaseous fuel jet

“…Flame volume and heat release rate (HRR) are two important parameters. The flame volume is often counted as a representation of HRR, and considerable studies have been performed to reveal the relationship between these two parameters [13][14][15][16][17][18][19]. Rasbash et al [13] proposed that the volumetric heat release rate of flame is approximately 1900 kW/m 3 .…”