Research On The Problem Of Diffusion Gas Co Shenyang Gas Pipeline Leakage

Natural gas, gas and fuel gas leakage to the outside world, whether indoor or outdoor are formed and mix with the air mixture when mixed gases in a certain spatial met within combustible concentration limits and in the event of ignition source will cause the detonation of explosive accidents.The impact of the explosion limits its factors include flammable gas temperature,pressure purity,container size,sources of rgnition nature as well as other contributing factors.Through the one-pure flmmable gases,pure combustible gas mixtures,multi-combustible mixture of gases such as explosive limits of the method of calculation for research and comparative analysis,with a solid combustible gas mixture explosion limits are calculated as part of the research of gas leakage proliferation of the law governing the theoretical basis.In accordance with the abjective of the study,and conducted a pilot study on flammable gas.The first pilot program design,the indoor structures the probliferation of gas leakage test.Through the pilot study,and data analysis and concluded that differences in the impact of factors of indoor gas leaks in the distribution of the concentration of the proliferation and the pattern of changes in,and for the creation of the accuracy of the spill model for authentication.Analysis of the diffusion process data support so as to arrive at the indoor gas leakage of the proliferation of laws.Includes the following several aspects.First,the combustible gas explosion limits the impact of factors as well as the calculation method for analysis.Explore three Combustible Gas Explosion limits the calculation method and to pure combustible gas mixture.Explosion limits are calculated in a way as part of a study on the methods of combustible gas explosion limits are calculated.Second,the continuity equation、momentum equation、energy equation、reactive groups transport and density equations and consider the buoyancy correction equation based on turbulence.To establish the mathematical model of indoor gas leakage diffusion model,the initial conditions are given,the application of finite volume method and SIMPLE algorithm are used to discretize and solve the equation.Third,using natural gas as the research object to gas distribution theory,gas jet theory and computational fluid mechanics theory.According to the distribution of the concentration of the diffusion process by using the testing technology and computer data processing technology of modern gas leak site small experiment under various influencing factors.According to the experimental results,the appropriate selection of leakage diffusion model, numerical simulation was carried out using CFD Technology.Both focus on verification and practical experiments,and combined with the theory of model optimization.The whole process of the research the combination of theory and practiceShenyang City Gas Company gas pipeline leakage diffusion problem measures include strict engineering quality,increase on illegal Zhanya elimination efforts,strengthen promotion network risks rectification,strength the network patrol line and key parts of the monitoring and guarantee,the safety of rescue process etc.