Simulation and analysis of the consequences of gas pipeline leakage in high consequence area pipe corridors
Due to the fact that some gas pipeline corridors are set in densely populated buildings,casualties and property losses are easi-ly caused once leakage and explosion occur.Therefore,it is necessary to simulate and analyze the consequences of gas pipeline leakage in pipeline corridors.Based on CFD method,the natural gas leakage diffusion and ignition model in the pipeline corridor was estab-lished.Fluent software was used to study the influence of different internal and external factors on the diffusion behavior of leaking natu-ral gas.According to the simulation results,the overpressure,high temperature and thermal radiation generated by the explosion were an-alyzed,and the influence degree and range on personnel and buildings were evaluated.The research results indicate that the concentra-tion and range of hazardous areas for CH4 and H2 S are positively correlated with pipeline transmission pressure and leakage aperture,and negatively correlated with wind speed;the presence of buildings can cause gas to accumulate on the windward side of the building,but when the building is below a certain height,natural gas can form a hazardous area on the leeward side of the building;after the natu-ral gas leakage and explosion,the impact and range of high temperature and thermal radiation are relatively small,while the impact and range of overpressure are relatively large.
pipeline corridorgas pipelinenatural gas leakage diffusionexplosionnumerical simulation
NETL
NSTL
万方数据
