The design of duct venting of gas explosions

Benedetto, Almerinda Di; Russo, Paola; Salzano, Ernesto

doi:10.1002/prs.10239

Cited by 12 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…With the aim of exploring the characteristics of explosions in ducted vessels, several researchers employed propane-air mixtures (Bouhard et al, 1991;Ferrara et al, 2005;Iida et al, 1985;Kasmani et al, 2013;Ponizy et al, 2014;Willacy et al, 2007). Investigations were also carried out with acetone-air (Benedetto et al, 2008) and town gas-air (Kordylewski and Wach, 1986) mixtures (town gas is a gas mixture and includes mainly methane and hydrogen with smaller fractions of CO2 and CO). Vessels of various geometries, such as cylindrical (Ferrara et al, 2008;Ponizy et al, 2014) and spherical (Kordylewski and Wach, 1988) shapes, were employed in prior research.…”

Section: Introductionmentioning

confidence: 99%

Explosion characteristics of methane–air mixtures in a spherical vessel connected with a duct

Kundu

Zanganeh

Eschebach

et al. 2017

Process Safety and Environmental Protection

View full text Add to dashboard Cite

With the aim of exploring explosion characteristics of methane-air explosive mixtures in a ducted vessel, a 20 litre spherical vessel connected with a 2813 mm long duct was employed. The experimental setup was comprised of a wafer check valve, which kept the methane-air mixture initially confined and opened at the time of explosion. The system introduced turbulence to the gas mixture during operation and pyrotechnic igniters were employed in the investigation. This approach assisted to obtain data that can be correlated with real world ducted explosion accidents where the explosion initiates in the presence of strong ignition energies and in turbulent states of methane-air mixtures. This study shows that the explosion severity can be very high in the turbulent field of methane-air mixture and in the presence of strong ignition energies. The pressure rise in the vessel and the flame speed along the length of the duct were found to be higher in the present study when compared to data obtained with quiescent mixtures of methane-air and low ignition energies. The impact of the duct length and pyrotechnic igniters' energy on reduced peak explosion pressure was characterised. The rate of pressure rise, a parameter linked to the burning rate, increased from the ducted to the vented configurations of the explosion test units.

show abstract

Section: Introductionmentioning

confidence: 99%

Explosion characteristics of methane–air mixtures in a spherical vessel connected with a duct

Kundu

Zanganeh

Eschebach

et al. 2017

Process Safety and Environmental Protection

View full text Add to dashboard Cite

show abstract

“…Furthermore, it can be seen from the table that with the increase in the bend distance, the maximum pressure rise rate in the vessel shows a decreasing trend. Shorter the bend distances ( d vb ) lead to the greater hindrance to the effective venting of the explosive products, strengthening the turbulence intensity in the vessel, accelerating the reaction rate, 13,23,24 and increasing the maximum explosive overpressure and pressure rise rate in the vessel.…”

Section: Resultsmentioning

confidence: 99%

Experimental study on dust explosion vented through a bent duct

Pang

Zhang

Cui

et al. 2020

Process Safety Progress

View full text Add to dashboard Cite

In this study, a self‐designed small cylindrical vessel was used to perform a dust explosion venting experiment through a bent duct. Based on this experiment, the influence of the bend distance and the static activation overpressure of the venting film on the explosion overpressure and the flame propagation was investigated. The results showed that both the maximum venting overpressure and pressure rise rate within the vessel increased with the decrease in the bend distance and increase in the static activation overpressure. In contrast, the duration of the combustion within the vessel exhibited the opposite trend. A typical “three‐peak” overpressure structure formed by the film rupture shock wave, secondary explosion in the duct, and continuous combustion within the vessel was observed in the duct. The third peak overpressure was dominant throughout the process. The intensity of the secondary explosion in the duct was positively correlated with the bend distance and static activation overpressure. Shorter bend distances led to greater peak‐overpressure drops after passing the bend. However, the attenuation of the secondary explosion intensity along the duct with static activation overpressure is not obvious.

show abstract

“…ahol a lángfront turbulenciának és áramlásnak köszönhető ráncolódása a lefúvónyílás közelében; egy általánosított lefúvási együttható. A kettő hányadosát Molkov (említve: Di Benedetto et al [19]) a következő összefüggéssel írja le:…”

Section: Bradley éS Mitcheson öSszefüggéseiunclassified

Por- és gázrobbanásokkal kapcsolatos vizsgálatok alapjai és tapasztalatai

Mikáczó

Szepesi

2021

MDT

View full text Add to dashboard Cite

Az ipari környezetben kialakuló por- és gázrobbanások számos veszélyt hordoznak magukban, amelyek következményeinek súlyossága lefúvásos védelemmel mérsékelhető. A szerkezetekben ekkor kialakuló redukált nyomás értéke nehezen jelezhető előre, hiszen a lejátszódó fizikai-kémiai folyamatok rendkívül összetettek. A lefúvóvezetékkel kiegészített hasadófelületek robbanást mérséklő hatása még ennél is bizonytalanabb, a mérnöki gyakorlatban pedig a szabványi számításoktól eltérő megoldásokra is igény mutatkozik. Jelen cikk a tématerület alapjait és a szerzők korábbi kutatásainak tapasztalatait foglalják össze. Megjelenésének célja, hogy segítséget nyújtson azok számára, akik jelenleg csak ismerkednek a szakterülettel, ám további kutatásokat szeretnének végezni a témában.

show abstract

The design of duct venting of gas explosions

Cited by 12 publications

References 21 publications

Explosion characteristics of methane–air mixtures in a spherical vessel connected with a duct

Explosion characteristics of methane–air mixtures in a spherical vessel connected with a duct

Experimental study on dust explosion vented through a bent duct

Por- és gázrobbanásokkal kapcsolatos vizsgálatok alapjai és tapasztalatai

Contact Info

Product

Resources

About