Numerical Simulation Study On Flammable Gas Release And Dispersion Process

In the process and relevant industries, accidental releases often occur in the production, storage and transportation of flammable, explosive and toxic materials. These accidents will lead to not only economic loss but also catastrophic consequence. These may include economic cost and casualties not only in the plant area but also in area outside the plants, especially the irreversible damage to the environment. Developing the study on accidental release and simulation of emergent sealing is crucial important for chemical and petrol-chemical industries to establish emergence plans and organize the emergence rescue by the social emergence service.First of all, model of industry accidental release and dispersion process was discussed in this thesis. After analyzing and comparing with the advantages and disadvantages of them, CFD computational fluid dynamics model was applied in this thesis. Using CFD software to numerical simulate the flammable gas release and dispersion process in pressure vessels, this paper summed up the quantitative relationship of tank pressure and leakage mouth, the results in this paper could be considered the outside wind speed, and thermal leakage binding effect of, and more reasonable, and the results can be easily transported in flammable gas leakage in the safety prediction and evaluation. In the end, leakage mouth size, location and obstacles' effects on flammable gas dispersion were analyzed.