LES Blowout Analysis of Premixed Flow Past V-gutter Flameholder

Lean blowoff of bluff body stabilized flames: Scaling and dynamics

“…The simulations of Smith et al [69] shown in Fig. 30, clearly show the shrinking size of the high temperature wake region as blowoff is approached.…”

“…11 and 19, and several other studies [58,59,69,70]. One possibility is that this occurs at the point where the flow transitions from a wake to a jet [71], or that it related to the far-wake instability described in Section 2.1.1.…”

“…In this experiment, such holes were observed below an equivalence ratio of 4/4 LBO ¼ 1.10. Similarly, observations of ''holes'' in the flame near blowoff have been computed [69], such as shown in Fig. 20.…”

“…A set of these references, tabulated in Table 1, containing 536 data points were utilized for these correlations [10,[25][26][27]50,52,56,61,63,[65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80], as they contained at least the following information: (1) bluff body dimension and blockage ratio, (2) flow velocities, (3) fuel, (4) fuel/air ratio, (5) oxidizer/ diluent composition (e.g., vitiation level), (6) pressure, and (7) preheat temperature. Detailed enumeration of each of these blowoff point conditions is contained in Husain's thesis [84].…”

“…Computed temperature distribution for bluff body stabilized flames at low dilatation ratios[69] (Re D ¼ 56,000).…”