Assessment on the effectiveness of suppressing premixed fuel-air explosion by ultra-fine cold aerosol

2015 ◽  
pp. 571-576
Keyword(s):  
Air Explosion

Study on the combined effect of duct scale and SBC concentration on duct-vented methane-air explosion

2021 ◽  
Vol 148 ◽  
pp. 939-949
Author(s):  
Minggao Yu ◽  
Yuanpeng Fu ◽  
Ligang Zheng ◽  
Rongkun Pan ◽  
Xi Wang ◽  
...  
Keyword(s):  
Combined Effect ◽  
Air Explosion

Suppression of methane/air explosion by kaolinite-based multi-component inhibitor

2019 ◽  
Vol 343 ◽  
pp. 279-286 ◽  
Author(s):  
Yaru Sun ◽  
Bihe Yuan ◽  
Xianfeng Chen ◽  
Kaiyuan Li ◽  
Liancong Wang ◽  
...  
Keyword(s):  
Air Explosion

scholarly journals The Role of Façade Materials in Blast-Resistant Buildings: An Evaluation Based on Fuzzy Delphi and Fuzzy EDAS

Algorithms ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 119 ◽  
Author(s):  
Hamidreza Hasheminasab ◽  
Sarfaraz Hashemkhani Zolfani ◽  
Mahdi Bitarafan ◽  
Prasenjit Chatterjee ◽  
Alireza Abhaji Ezabadi
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Hazard Identification ◽  
Fuzzy Evaluation ◽  
Gas Industry ◽  
Building Facade ◽  
Fuzzy Delphi ◽  
Building Facades ◽  
Materials Used ◽  
Air Explosion

Blast-resistant buildings are mainly used to protect main instruments, controllers, expensive equipment, and people from explosion waves. Oil and gas industry projects almost always include blast-resistant buildings. For instance, based on a hazard identification (HAZID) and hazard and operability (HAZOP) analysis of a plant, control rooms and substations are sometimes designed to withstand an external free air explosion that generates blast over pressure. In this regard, a building façade is considered to be the first barrier of resistance against explosion waves, and therefore a building façade has an important role in reducing a building’s vulnerability and human casualties. In case of a lack of enough resistance, explosion waves enter a building and bring about irreparable damage to the building. Consequently, it seems important to study and evaluate various materials used in a façade against the consequences of an explosion. This study tried to make a comparison between different types of building facades against explosion waves. The materials used in a building play a key role in the vulnerability of a building. In this research, a literature review and the fuzzy Delphi method were applied to find the most critical criteria, and then a fuzzy evaluation based on the distance from the average solution (EDAS) was applied in order to assess various materials used in building facades from the perspective of resiliency. A questionnaire was presented to measure effective indices in order to receive experts’ ideas. Finally, by implementing this methodology in a case study, it was concluded that a stone façade performs much better against explosions.

Effects of concentration, temperature, ignition energy and relative humidity on the overpressure transients of fuel-air explosion in a medium-scale fuel tank

Fuel ◽  
2020 ◽  
Vol 259 ◽  
pp. 116265 ◽  
Author(s):  
Shimao Wang ◽  
Dejian Wu ◽  
Hai Guo ◽  
Xiangdong Li ◽  
Xuyang Pu ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Fuel Tank ◽  
Ignition Energy ◽  
Medium Scale ◽  
Air Explosion

scholarly journals Gaseous combustion at high pressures. Part IV.—The influence of varying initial pressures upon the rate of pressure development and the activation of nitrogen in carbon monoxide-air explosions

1924 ◽  
Vol 105 (732) ◽  
pp. 406-433
Keyword(s):  
Carbon Monoxide ◽  
High Pressures ◽  
Vibrational Energy ◽  
Initial Pressure ◽  
Maximum Pressure ◽  
Time Interval ◽  
Pressure Development ◽  
The One ◽  
Air Explosion ◽  
Energy Absorbing

In the previous paper of this series it was shown :— (1) that when nitrogen is added as a diluent to a mixture of 2CO+O 2 undergoing combustion in a bomb at an initial pressure of 50 atmospheres, it exerts a peculiar energy-absorbing influence upon the system, far beyond that of other diatomic gases, or of argon; (2) that by virtue of such influence, it retards the attainment of maximum pressure in a much greater degree than can be accounted for on the supposition of its acting merely as a diatomic diluent; (3) that the energy so absorbed by the nitrogen during the combustion period, which extends right up to the attainment of maximum pressure, is slowly liberated thereafter as the system cools down ; and that consequently the rate of cooling is greatly retarded for a considerable time interval after the attainment of maximum pressure; (4) that there is no such energy-absorbing effect ( i. e ., other than a purely "diluent" one) when nitrogen is present in a 2H 2 +O 2 mixture similarly undergoing combustion ; but that, on the contrary, the presence of hydrogen in a CO-air mixture undergoing combustion at such high pressures so strongly counteracts the said " energy-absorbing " influence of the nitrogen, that it must be excluded as far as possible from the system before any large nitrogen-effect can be observed. These facts were explained on the supposition that there is some constitutional correspondence between CO and N 2 molecules (whose densities are identical) whereby the vibrational energy (radiation) emitted when the one burns is of such a quality as can be readily absorbed by the other, the two thus acting in resonance. It was further supposed that, in consequence of such resonance, nitrogen becomes chemically " activated " when present during the combustion of carbon monoxide at such high pressures ; and in conformity with this supposition, it was shown that such "activated" nitrogen is able to combine with oxygen more readily than does nitrogen which has merely been raised to a correspondingly high temperature in a hydrogen-air explosion.

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