Smoke-point properties of non-buoyant round laminar jet diffusion flames

Numerical study of the effects of gravity on soot formation in laminar coflow methane/air diffusion flames under different air stream velocities

“…There have been many experimental studies on the structure and sooting behaviour of non-buoyant diffusion flames [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Earlier experimental studies focused on the transient behaviour of the flame when it is suddenly subject to 0 g from normal gravity (1 g) using drop tower [3,5,6] and the overall flame shape (diameter, length) and appearance [4,7,8].…”

“…Earlier experimental studies focused on the transient behaviour of the flame when it is suddenly subject to 0 g from normal gravity (1 g) using drop tower [3,5,6] and the overall flame shape (diameter, length) and appearance [4,7,8]. More recent experimental investigations at 0 g examined the smoke point properties [9,15,16] and measured soot volume fraction distributions [11][12][13][14][15]. However, it is observed that in almost all of these experimental studies the jet diffusion flames were generated without the co-flowing air, i.e.…”

An Experimental Investigation of the Laminar Flamelet Concept for Soot Properties

“…Complete descriptions of the information obtained from these experiments, along with a summary of the background and motivation for carrying out long term experiments at microgravity using the orbiting Space Shuttle Columbia, can be found in Refs. [10,11,14,15] . The present work will consider data from all three flights but emphasizing results obtained during Flight STS-107.…”

Effects of Gravity on Soot Formation in a Coflow Laminar Methane/Air Diffusion Flame

“…Thus soot research has received considerable attention in both normal gravity and microgravity (Haynes and Wagner 1981;Glassman 1988;K ue ta l .1995;Haggard and Cochran 1972;Greenberg and Ku 1997a, b;Megaridis et al 1996;Sunderland et al 1994;Urban et al 2000;Konsur and Megaridis 1999;Lin et al 1999;Aalburg et al 2005;Walsh et al 2000;Kaplan et al 1996a). In microgravity, the elimination of buoyancyinduced flows increases the residence time and decreases the fresh air supply.…”

“…Most studies have focused on experimental investigations on the soot field structures at microgravity (Greenberg and Ku 1997a, b;Megaridis et al 1996;Sunderland et al 1994;Urban et al 2000;Konsur and Megaridis 1999;Lin et al 1999;Aalburg et al 2005) to elucidate the effects of buoyancy on soot formation. However, it is difficult to investigate all the aspects that influence soot formation because of the cost and the limited number of experiments that can be conducted in microgravity.…”