Effects of top vent locations and gasoline volumes on vented gasoline vapor explosion in closed small-scale vessel

Fuel ◽  
2020 ◽  
Vol 277 ◽  
pp. 118226
Author(s):  
Chuanyu Pan ◽  
Guochun Li ◽  
Xishi Wang
Keyword(s):  
Small Scale ◽  
Vapor Explosion ◽  
Gasoline Vapor

scholarly journals Gasoline Vapor Explosion Modes in Confined Space under Weak Constraint Conditions

2021 ◽  
Vol 770 (1) ◽  
pp. 012049
Author(s):  
Jianjun Liang ◽  
Shimao Wang ◽  
Shu Liu ◽  
Peili Zhang ◽  
Dong Wang ◽  
...  
Keyword(s):  
Confined Space ◽  
Vapor Explosion ◽  
Gasoline Vapor

Synergy effects of Novec 1230 and venting on ethanol-gasoline vapor explosion inhibition

2021 ◽  
pp. 1-19
Author(s):  
Chuanyu Pan ◽  
Jiangyue Zhao ◽  
Xiaolong Zhu ◽  
Huazhong Sun ◽  
Guochun Li ◽  
...  
Keyword(s):  
Vapor Explosion ◽  
Gasoline Vapor ◽  
Synergy Effects

Effects of concentration, temperature, humidity, and nitrogen inert dilution on the gasoline vapor explosion

2017 ◽  
Vol 323 ◽  
pp. 593-601 ◽  
Author(s):  
Sheng Qi ◽  
Yang Du ◽  
Peili Zhang ◽  
Guoqing Li ◽  
Yi Zhou ◽  
...  
Keyword(s):  
Vapor Explosion ◽  
Gasoline Vapor

Study on the Explosion Characteristic Parameters of Gasoline Vapor Inerted by CO2

2013 ◽  
Vol 805-806 ◽  
pp. 1393-1397
Author(s):  
Yang Du ◽  
Jian Jun Liang ◽  
Shu Liu ◽  
Xin Sheng Jiang ◽  
Hai Bing Qian
Keyword(s):  
Oxygen Concentration ◽  
Vapor Concentration ◽  
Characteristic Parameters ◽  
Vapor Explosion ◽  
Concentration Variation ◽  
Explosion Pressure ◽  
Gasoline Vapor ◽  
Pressure Peak

This paper studied the characteristics parameters of gasoline vapor explosion through experiments in aφ0.48m * 28.69m long straight pipeline inerted by CO2. By changing the CO2, O2and gasoline vapor concentration, variation laws of gasoline vapor explosion characteristic parameters were explored and analyzed in this paper. Studies have shown that the decrease of oxygen concentration could not only reduce the explosion range, but also change the explosion pressure peak and peak times significantly.

scholarly journals Small Scale Experiments of CO2 Boiling Liquid Expanding Vapor Explosion in Injection Pipes

2014 ◽  
Vol 61 ◽  
pp. 782-786 ◽  
Author(s):  
Yi Zhou ◽  
Zhenyi Liu ◽  
Qian Huang ◽  
Feng Wang ◽  
Deping Zhang
Keyword(s):  
Small Scale ◽  
Vapor Explosion ◽  
Boiling Liquid

Experimental Visualization Study on the Explosion Process of Gasoline Vapor in Narrowly-Confined Space

2013 ◽  
Vol 791-793 ◽  
pp. 2108-2111 ◽  
Author(s):  
Jian Jun Liang ◽  
Yang Du ◽  
Yi Hong Ou ◽  
Xin Sheng Jiang ◽  
Hai Bing Qian ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flow Field ◽  
Data Acquisition ◽  
High Speed ◽  
Development Stage ◽  
High Speed Camera ◽  
Confined Space ◽  
Vapor Explosion ◽  
Gasoline Vapor ◽  
Explosion Process

In this paper, experimental study on gasoline vapor explosion was conducted with data acquisition technology of high-speed camera. In the experiments, the flame behaviors and the flow field movements were shot by the high-speed camera, the space pressure were recorded by high-speed dynamic tester, and the explosion process were analyzed refinedly and intuitively. Studies have shown that according to variations of flame behaviors and pressure characteristics, process of gasoline vapor explosion can be divided into four stages: the ignition stage, the development stage, the intensification stage and the plume stage.

Effects of Mechanical Constraint and Heat Capacity on Vapor Explosions

2007 ◽  
Author(s):  
Masahiro Furuya ◽  
Takahiro Arai
Keyword(s):  
Oxide Layer ◽  
Water Droplet ◽  
Droplet Diameter ◽  
Molten Alloy ◽  
Small Scale ◽  
Oxide Surface ◽  
Mirror Surface ◽  
Vapor Explosion ◽  
Spontaneous Nucleation ◽  
Vapor Explosions

Small-scale experiments have been conducted to investigate the triggering mechanism of vapor explosions. In order to attain good repeatability and visibility, a smooth round water droplet was impinged onto a molten alloy surface. This configuration suppresses premixing events prior to triggering. The effect of the water droplet curvature was found to be negligibly small when the droplet diameter is larger than 4.5 mm. Vapor explosion conditions were identical for the molten tin pool depths ranging from 0.5 to 40 mm. The experimental results and the heat conduction analysis suggest that the length scale required for atomizing and fine mixing in the triggering event of the vapor explosion are sufficiently smaller than the molten tin pool depth of 0.5 mm. Six different kinds of materials were used as the pool liquid. The lower limit of the contact temperature in the vapor explosion region closely agrees with the spontaneous nucleation temperature of water. The upper limit of the initial molten alloy temperature decreases when an oxide layer forms on the surface causing an increase of the emissivity of thermal radiation that has a stabilizing effect on the vapor film. When an oxide layer formed on the surface, a water droplet was occasionally entrapped into a molten alloy dome, since the oxide layer prevents the droplet from evaporating coherently. The vapor explosion region obtained for the mirror surface is a conservative estimate, since that for the oxide surface fell into the internal region of mirror surface.

Experimental Study on the Pressure Characteristics of Gasoline Vapor Explosion under Weak Restrictions

2013 ◽  
Vol 454 ◽  
pp. 226-229 ◽  
Author(s):  
Jian Jun Liang ◽  
Dong Hai He ◽  
Yang Du ◽  
Shu Liu ◽  
Jian Zhong Zhou
Keyword(s):  
Experimental Study ◽  
Experimental Studies ◽  
Initial Radius ◽  
Vapor Explosion ◽  
Explosion Pressure ◽  
Gasoline Vapor ◽  
Explosion Center ◽  
Pressure Characteristics

In this paper, the pressure characteristics of gasoline vapor explosion under weak restrictions was investigated experimentally. The experimental studies have shown that explosion pressure maximized when Rs/R0 was in the range of 1.5~2.0, and when Rs/R0 > 1.5, pressure was proportional to the 2.45 power of the initial radius, and attenuated with the extended distances from the explosion center according to the rule of negative exponent.

Reasons to strike first

2019 ◽  
Vol 42 ◽  
Author(s):  
William Buckner ◽  
Luke Glowacki
Keyword(s):  
Intergroup Conflict ◽  
Small Scale

Abstract De Dreu and Gross predict that attackers will have more difficulty winning conflicts than defenders. As their analysis is presumed to capture the dynamics of decentralized conflict, we consider how their framework compares with ethnographic evidence from small-scale societies, as well as chimpanzee patterns of intergroup conflict. In these contexts, attackers have significantly more success in conflict than predicted by De Dreu and Gross's model. We discuss the possible reasons for this disparity.

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