Formation of weak shock waves ahead of a flame front and their intensification during passage through the flame☆

Salamandra, G. D.; Sevastyanova, I.K.

doi:10.1016/0010-2180(63)90027-0

Cited by 1 publication

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“…The tulip flame mentioned in the last section is a little understood phenomenon, first observed by Mallard and Le Chatelier 1 and coined by Salamandra et al 20 Throughout the years, researchers have proposed several explanations for this curious occurence, including the radial axial velocity gradient ahead of the flame, 21 squish flow at the tube walls, 22 vorticity produced in the flow of the unburnt gases, 23 and manifestations of the Rayleigh-Taylor instability. 19,24 All of these are plausible and perhaps have their own contributions.…”

Section: Observations Of the "Tulip Flame" Phenomenonmentioning

confidence: 98%

Flame Propagation from the Closed End of an Open-ended Tube: an analysis of the effects of fuel type, tube length, and equivalence ratio and an insight into flame dynamics

Gray

Moeck

Paschereit

2013

49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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Non-steady flame propagation in tubes has implications not only in explosion and hazard saftey, but also in the energy sector, as focus shifts towards pulsating constant volume combustion. Therefore, it is important to understand phenomena associated with these flames and their fine subtleties. These studies deal with flame propagation in tubes of small diameter and of varying lengths. The tubes are closed at the ignition end and open at the other. Natural gas-air as well as propane-air mixtures were investigated at different equivalence ratios. The propagating flames were recorded using high-speed imagery and the pressure at the base of the tube was measured with a condensor microphone. The relationship between flame propagation and pressure development were investigated and some interesting observations about flame dynamics are noted.

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Section: Observations Of the "Tulip Flame" Phenomenonmentioning

confidence: 98%