Numerical Simulation And Experimental Validation Of Explosion Venting

The concept of explosion venting encompasses all measures used to open the originally closed vessels and equipment either briefly or permanently in a non-hazardous direction following an explosion and explosion venting technology describes one of the possible protective measures against the effect of explosions. Numerical simulation is made in the dissertation to study explosion venting.Firstly, normal results and external explosions results of experiment were introduced on which a conclusion is based.Secondly, a numerical simulation, in terms of two-dimension Euler equations coupled with chemical reactions, was constructed based on a simplified model. A splitting-operator technology was used to solve the equations. The gas dynamic equations were solved by using the second order TVD scheme, and the chemical reactions of methane-air were solved by using a chemical kinetic mechanism including 19-element reactions and 14 species.Thirdly, explosion ventings were simulated numerically with the constructed method since the state of chemical balance of the premixed methane-air system in a closed vessel. The simulations showed that such explosion ventings were normal.Finally, two explosion ventings were simulated numerically with the constructed method since ignition in the premixed methane-air system in the closed vessel. The computational results of one simulation were compared with the experimental results, and the qualitative agreement was obtained. The other simulation, which was beyond the experimental condition, was beneficial to the explosion venting research.