Turbulent flame propagation in obstacle-filled tubes

Lee, J.H.; Knystautas, R.; Chan, C. K.

doi:10.1016/s0082-0784(85)80662-7

Cited by 143 publications

(60 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This mechanism is the basis of defining the so-called "choking" regime. 8 deflagration regime can be made if one considers the auto-ignition limit to separate detonative and supersonic deflagrative combustion. In other words, the averaged propagation velocity of a quasi-detonation should be such that the post-shock temperature of a C-J detonation at that velocity is above the auto-ignition limit of the mixture.…”

Section: Previous Workmentioning

confidence: 99%

“…This suggests that the obstacle array of staggered vertical rods creates a more "uniform" turbulent reaction zone without the "jetting" effect due to the circular orifice plate obstacles used in previous studies. 8 The pressure rise associated with the combustion wave was monitored by a PCB pressure transducer. In general, the pressure records for supersonic combustion waves…”

Section: Diagnosticsmentioning

confidence: 99%

See 1 more Smart Citation

The propagation mechanism of high speed turbulent deflagrations

Chao

Lee

2003

Shock Waves

View full text Add to dashboard Cite

Section: Previous Workmentioning

confidence: 99%

Section: Diagnosticsmentioning

confidence: 99%

The propagation mechanism of high speed turbulent deflagrations

Chao

Lee

2003

Shock Waves

View full text Add to dashboard Cite

“…Flame propagation studies have been carried out in a variety of such geometries, including interconnected cylindrical volumes [7] and cubic volumes [8]. An extensive research programme was carried out at McGill University in the 1980s investigating explosion front propagation in a tube filled with periodic orifice plates that can be treated as interconnected cylindrical shaped compartments [9,10]. As background knowledge for the discussion of explosions in porous media, a brief review of combustion propagation in an obstacle-laden channel is provided in §2a.…”

Section: Flame Propagation In Multi-compartment Channelsmentioning

confidence: 99%

“…Experiments investigating explosion front propagation in tubes equipped with equally spaced orifice plates were performed by Lee et al [9]. The experiments were carried out in larger diameter tubes with different fuel-air mixtures.…”

Section: (B) Steady-state Propagation Regimesmentioning

confidence: 99%

“…Ignition is caused by the mixing of the hot products issuing from one compartment with unburned gas in the adjacent compartment. Lee et al [9] proposed that quenching occurs when the ignition fails to occur because the characteristic mixing time is shorter than the characteristic chemical reaction time. Kuznetsov et al [17] observed quenching in less-reactive mixtures in high-blockage square cross-sectional channels.…”

Section: (B) Steady-state Propagation Regimesmentioning

confidence: 99%

See 1 more Smart Citation

Explosion propagation in inert porous media

Ciccarelli

2012

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

Porous media are often used in flame arresters because of the high surface area to volume ratio that is required for flame quenching. However, if the flame is not quenched, the flow obstruction within the porous media can promote explosion escalation, which is a well-known phenomenon in obstacle-laden channels. There are many parallels between explosion propagation through porous media and obstacle-laden channels. In both cases, the obstructions play a duel role. On the one hand, the obstruction enhances explosion propagation through an early shear-driven turbulence production mechanism and then later by shock-flame interactions that occur from lead shock reflections. On the other hand, the presence of an obstruction can suppress explosion propagation through momentum and heat losses, which both impede the unburned gas flow and extract energy from the expanding combustion products. In obstacle-laden channels, there are well-defined propagation regimes that are easily distinguished by abrupt changes in velocity. In porous media, the propagation regimes are not as distinguishable. In porous media the entire flamefront is affected, and the effects of heat loss, turbulence and compressibility are smoothly blended over most of the propagation velocity range. At low subsonic propagation speeds, heat loss to the porous media dominates, whereas at higher supersonic speeds turbulence and compressibility are important. This blending of the important phenomena results in no clear transition in propagation mechanism that is characterized by an abrupt change in propagation velocity. This is especially true for propagation velocities above the speed of sound where many experiments performed with fuel-air mixtures show a smooth increase in the propagation velocity with mixture reactivity up to the theoretical detonation wave velocity.

show abstract

Flame quenching by crimped ribbon flame arrestor: A brief review

Wang

Shen

et al. 2018

Process Safety Progress

View full text Add to dashboard Cite

Accidental explosions in gas/oil pipelines remain one major concern in process industries. The crimped ribbon flame arrestor is an effective device to prevent flame propagation. This review summarizes existing knowledge on the quenching of flame of different regimes in narrow channels and crimped ribbon flame arrestors. The influences of various parameters (e.g., arrestor element thickness, expansion ratio, system pressure) on the performance of crimped ribbon flame arrestors are discussed. The presented discussions give a better understanding on the considerations which must be taken into account to quench an explosion successfully. Other scenarios, such as quenching of two-phase vapor-liquid explosions and overdriven detonations should be got further attention. Figure 18. The results of quenching ethylene/air/oxygen flames by a DN50 flame arrestor [114]. Black dot: flame quenched; red cross: flame not quenched. [Color figure can be viewed at wileyonlinelibrary.com]

show abstract

Turbulent flame propagation in obstacle-filled tubes

Cited by 143 publications

References 6 publications

The propagation mechanism of high speed turbulent deflagrations

The propagation mechanism of high speed turbulent deflagrations

Explosion propagation in inert porous media

Flame quenching by crimped ribbon flame arrestor: A brief review

Contact Info

Product

Resources

About