Intermittency and Conditional Velocities in Premixed Conical Turbulent Flames

High-Spatial-Resolution OH PLIF Visualization in a Cavity-Stabilized Ethylene-Air Turbulent Flame

“…8) was calculated for each pixel location in the matrix. Flame intermittency 19,20 was calculated to provide a statistical measurement of flame front movement. For each pixel location, intermittency is defined 1 as the proportion of images in which the OH signal is above a specified threshold.…”

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

“…This technique has been extensively used for flame front visualization of Bunsen-type flames [2,3,27,32,[49][50][51][52][53][54][55][56], V-shaped flames [2,36,37,[57][58][59], and swirl-stabilized flames [60][61][62]. The laser, light sheet optical assembly, CCD camera, and bandpass filter used in this technique were similar to the equipments utilized in the particle image velocimetry technique described in detail in Section 2.2.…”

Entrainment of Cold Gas Into Turbulent Premixed Acetylene Flame

“…Similar definition was used in (Cheng and Shepherd, 1987), to describe intermittency of unburned reactants and combustion products at the same point. The mixing factor n in our case, is defined as Combustion Science and Technology 2001.164:95-112. the probability that fluid originating from the jet is present at any given point.…”

“…ai., 1976) and between reacting turbulent flows and coflowing air stream (Moss, 1980) and (Cheng and Shepherd, 1987). Experimental measurement of conditional and unconditional statistics in premixed flames of various configurations (Cheng and Shepherd, 1987), (Cheng, 1984) and (Libby et. al., 1989) are vital to establish relationships between the properties of the two zones, the reactions and the product zones.…”

“…aI., 1975), (CheaCombustion Science andTechnology 2001.164:95-112. vray andTutu, 1978), (Bilger et. ai., 1976) and between reacting turbulent flows and coflowing air stream (Moss, 1980) and (Cheng and Shepherd, 1987). Experimental measurement of conditional and unconditional statistics in premixed flames of various configurations (Cheng and Shepherd, 1987), (Cheng, 1984) and (Libby et.…”