Detonation limits in rough walled tubes

Starr, Amanda; Lee, John H. S.; Ng, Hoi Dick

doi:10.1016/j.proci.2014.06.130

Cited by 42 publications

(18 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11b, c, also shows this behaviour of detonation propagation from the left to the right side of the tube. This detonation limit behaviour is closer to that observed in a rectangular channel, i.e., single slapping wave, rather than the single-head spin reported by Starr et al [15] for a tube equipped with a spiral.…”

Section: Effect Of Higher Blockage Ratiosupporting

confidence: 86%

“…The soot-foil technique is commonly used in smooth, round tubes (void of obstacles) to record the detonation cellular structure to obtain the average detonation cell size [13,14]. The soot-foil technique was used by Ng et al to study the propagation of a quasi-detonation wave in a round tube equipped with a Shchelkin spiral [15]. They reported that at the limit, the detonation propagated as a single-head spin.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the propagation mechanism of a detonation wave in a round tube with orifice plates

Ciccarelli

Cross

2016

Shock Waves

View full text Add to dashboard Cite

This study deals with the investigation of the detonation propagation mechanism in a circular tube with orifice plates. Experiments were performed with hydrogen air in a 10-cm-inner-diameter tube with the second half of the tube filled with equally spaced orifice plates. A self-sustained Chapman-Jouguet (CJ) detonation wave was initiated in the smooth first half of the tube and transmitted into the orifice-plate-laden second half of the tube. The details of the propagation were obtained using the soot-foil technique. Two types of foils were used between obstacles, a wall-foil placed on the tube wall, and a flat-foil (sooted on both sides) placed horizontally across the diameter of the tube. When placed after the first orifice plate, the flat foil shows symmetric detonation wave diffraction and failure, while the wall foil shows re-initiation via multiple local hot spots created when the decoupled shock wave interacts with the tube wall. At the end of the tube, where the detonation propagated at an average velocity much lower than the theoretical CJ value, the detonation propagation is much more asymmetric with only a few hot spots on the tube wall leading to local detonation initiation. Consecutive foils also show that the detonation structure changes after each obstacle interaction. For a mixture near the detonation propagation limit, detonation re-initiation occurs at a single wall hot spot producing a patch of small detonation cells. The local overdriven detonation wave is short lived, but is sufficient to keep the global explosion front propagating. Results associated with the effect of orifice plate blockage Communicated by and spacing on the detonation propagation mechanism are also presented.

show abstract

Section: Effect Of Higher Blockage Ratiosupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

On the propagation mechanism of a detonation wave in a round tube with orifice plates

Ciccarelli

Cross

2016

Shock Waves

View full text Add to dashboard Cite

show abstract

“…The present methodologies (Ciccarelli and Dorofeev, 2008;Ciccarelli et al, 2013;Ivanov et al, 2011;Oran and Gamezo, 2007;Petchenko et al, 2007;Pinos and Ciccarelli, 2015;Starr et al, 2015;Zipf et al, 2014) for studying the interaction mechanism between the flame and shock wave usually involve experiments and simulations in long tubes, which can generate the turbulent flame and make flame acceleration to trigger the shock wave and even detonation. For a freely expanding flame, the initially smooth surface of the flame is wrinkled due to Darrieus-Landau instability with thermal diffusion effect.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Turbulent Flame Propagation and Pressure Oscillation in a Constant Volume Chamber Equipped With an Orifice Plate

Wei

Gao

Zhou

et al. 2017

Combustion Science and Technology

View full text Add to dashboard Cite

In this work, the main contribution is an understanding of different combustion phenomena involving flame acceleration, flame propagation, and the pressure oscillation resulting from flameshock interactions. These physical phenomena were experimentally studied using a newly developed confined combustion chamber equipped with one or two orifice plates. The results showed that there are five stages of flame propagation when a laminar flame passes through the orifice plate in a confined space. These include the deceleration of the laminar flame, jet flame formation and rapid acceleration, deceleration of the flame, turbulent flame formation and acceleration, and turbulent flame propagation in the end-gas region. Flame acceleration and pressure oscillation were found to be strongly related to the aperture size of the orifice plate. The high amplitudes of pressure oscillations were found to be the results of two combustion mechanisms: the end gas auto-ignition and the interactions between the accelerated turbulent flame and shock wave. To further accelerate the flame and promote stronger disturbance in the end gas, another identical orifice plate was employed. Subsequently, strong flame-shock interaction caused end-gas auto-ignition with an extremely high-amplitude pressure oscillation. Eventually, the maximum amplitude of pressure oscillation exceeded 8 MPa as end-gas auto-ignition occurred in the end region of the combustion chamber.

show abstract

“…As suggested by Lee [75], the deficits are seldom larger than 15% when the detonation fails in smooth tubes. Recently, the effects of tube wall roughness on the detonation propagation was studied in hydrocarbonoxygen and hydrogen-oxygen mixtures [77][78][79][80]. Wall roughness was generated by inserting Shchelkin spirals into the tubes.…”

Section: Detonationmentioning

confidence: 99%

“…In tubes with a roughness larger than 0.333, the detonation is suppressed. Of note, the roughness was defined as the ratio of wire diameter to the pitch of the Shchelkin spirals [77,78].…”

Section: Detonationmentioning

confidence: 99%

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

Detonation limits in rough walled tubes

Cited by 42 publications

References 24 publications

On the propagation mechanism of a detonation wave in a round tube with orifice plates

On the propagation mechanism of a detonation wave in a round tube with orifice plates

Experimental Investigation of Turbulent Flame Propagation and Pressure Oscillation in a Constant Volume Chamber Equipped With an Orifice Plate

Flame quenching by crimped ribbon flame arrestor: A brief review

Contact Info

Product

Resources

About