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Experimental investigation of external explosion in the venting process
Zhi-Min Du1, Xin-Qiao Jin, Dong-Ming Cui
1Department of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China. duzhimin@sjtu.edu.cn
Journal of Zhejiang University. Science. B
|April 12, 2005
Summary
This study examined methane-air combustion and explosion venting in a cylindrical vessel. Key factors like fuel-air ratio and ignition location significantly influenced the venting process dynamics.
Area of Science:
- Combustion science
- Fluid dynamics
- Chemical engineering
Background:
- Understanding explosion venting is crucial for industrial safety.
- Methane-air mixtures are common in various industrial settings.
- Cylindrical vessel geometry influences combustion and venting phenomena.
Purpose of the Study:
- To investigate the combustion and explosion vent dynamics.
- To analyze the effect of equivalence ratio and ignition position on venting.
- To provide data for safety design in confined spaces.
Main Methods:
- Experimental setup using a 200 mm diameter x 400 mm length vertical cylindrical vessel.
- Utilized methane-air mixtures at equivalence ratios (Phi) of 0.8, 1.0, and 1.3.
- Varied ignition positions at the cylinder center and bottom with a 55 mm vent diameter.
Main Results:
- Observed distinct venting processes based on equivalence ratio and ignition location.
- Quantified the influence of Phi and ignition position on pressure rise and flame propagation.
- Identified critical parameters affecting explosion venting effectiveness.
Conclusions:
- Equivalence ratio and ignition position are critical determinants of explosion venting efficiency.
- Results offer insights into mitigating explosion hazards in similar geometries.
- Further research can optimize vent design based on these findings.