Numerical simulation of the influence of vent conditions on the characteristics of hydrogen explosion in confined space

2021 ◽  
pp. 1-19
Author(s):  
Ning Zhou ◽  
Yuan Mei ◽  
Xue Li ◽  
Bing Chen ◽  
Wei-Qiu Huang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Confined Space

Numerical simulation of wood crib fire behavior in a confined space using cone calorimeter data

2014 ◽  
Vol 119 (3) ◽  
pp. 2291-2303 ◽  
Author(s):  
Shaogang Zhang ◽  
Xiaomin Ni ◽  
Mei Zhao ◽  
Junjie Feng ◽  
Ruifang Zhang
Keyword(s):  
Numerical Simulation ◽  
Cone Calorimeter ◽  
Fire Behavior ◽  
Confined Space ◽  
Wood Crib

Numerical Simulation of Diffusion of UDMH in Confined Space

2013 ◽  
Vol 295-298 ◽  
pp. 586-589
Author(s):  
Jia Zhao Chen ◽  
Chao Ning ◽  
Yu Xiang Zhang
Keyword(s):  
Numerical Simulation ◽  
Concentration Distribution ◽  
Geometric Model ◽  
Polluted Area ◽  
Confined Space ◽  
Gas Concentration ◽  
Diffusion Pattern ◽  
Toxic Gas ◽  
3D Geometric Model ◽  
And Diffusion

In order to study the diffusion pattern of Unsymmetrical Dimethyl Hydrazine (UDMH) in a confined space, a 3D geometric model of cylindrical space with a column obstacle in the center was built and diffusion of UDMH in the space was simulated by using FLUENT. The gas concentration distribution in the space was gained at different moments, and the polluted area with concentration above 0.5ppm was focused on. The simulation result suggests that the toxic gas is mainly concentrated in an area about 1m above the bottom of the space, and ventilation can effectively reduce the hazard time and continuous expansion of polluted area.

Numerical Simulation of Effects of Gravity on the Micro Jet Flame in the Confined Space

2013 ◽  
Vol 732-733 ◽  
pp. 127-132
Author(s):  
Yun Hua Gan ◽  
Yan Lai Luo
Keyword(s):  
Numerical Simulation ◽  
Flame Structure ◽  
Numerical Data ◽  
Glass Tube ◽  
Flame Length ◽  
Zero Gravity ◽  
Gravity Level ◽  
Confined Space ◽  
Jet Flame ◽  
Ceramic Tube

A microscale ceramic tube was used as a burner jet, and a coaxial jet flame was established in the confined space between the ceramic tube and the outer quartz glass tube. The effects of gravity on the small jet flame characteristics in the confined space were investigated numerically. Comparisons between the experimental data and the numerical data showed that characteristics of the small jet flame structure and temperature field were in good agreement. It verified the accuracy of the numerical simulation. Numerical simulations of flame characteristics at zero gravity level were performed. The results show that the gravity level has a greater influence on the flame width than that on the flame length. The chemical reaction rate is larger under the condition of normal gravity than that of zero gravity.

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