Flame brush characteristics and burning velocities of premixed turbulent methane/air Bunsen flames

Effects of mixture composition and turbulence intensity on flame front structure and burning velocities of premixed turbulent hydrocarbon/air Bunsen flames

“…The seeding particles were produced by atomizing olive oil to sub-micron droplets using a nebulizer. A similar technique has been previously used in the literature, see, for example, [24,27,[33][34][35][36][37]. The laser beam was converted into a laser sheet using a LaVision light sheet optical assembly.…”

“…This property is controlled by the geometry and upstream location of the turbulence generator from the burner exit [24,30,31]. The r.m.s.…”

“…The holes of the perforated plates are arranged in a hexagonal array. This method of turbulence generation has been extensively utilized in the literature, see, for example, [24,[27][28][29][30][31][32][33][34][35][36][37]. The hole diameter (d), mesh size (M), blockage ratio (β), and upstream position of the perforated plate from the burner exit (h e ) for each of the perforated plate are summarized in Table 1.…”

“…This necessitated additional parameters for the turbulent burning velocity correlation, namely the bulk flow velocity, burner width, and turbulent Markstein number. Tamadonfar and Gülder [24] showed that the turbulent burning velocity decreases with increasing bulk flow velocity when other turbulence statistics are kept constant. They stated that this observation may be attributed to the formation of local extinctions due to an increase of flame front stretching caused by the large velocity gradients in shear layers.…”

Experimental study of the dynamic field of turbulent premixed methane/air flame using PIV technique

“…The effect of the equivalence ratio and turbulence intensity on the mean turbulent flame stretch factor has been studied. The flame brush thickness improved with increasing axial distance from the burner exit and equivalence ratio [17][18][19]. Levenţiu et al experimentally and numerically studied the instantaneous thermal structure of the flame front of premixed turbulent combustion of the lean methane-air mixture.…”