Research On Natural Gas Pipeline Leak Explosion Dynamic Effects And Division Of Hazardous Areas

In the background of the increasingly serious environmental and energy issues, urban gas pipe network plays a more and more important role in people’s daily lives, it has brought great convenience to town residents and businesses in the production."Dotted" natural gas pipeline network to the production of people’s lives, but the corresponding it also brings security risks, and city gas pipeline staggered aspect that accompany natural gas leak explosion accident after another. Natural gas pipeline network in the event of leakage, in a very short time to the rapid spread, triggering staff poisoning, fires, explosions and other accidents resulting in significant casualties and property losses to the surrounding environment, make people’s lives be abnormal. Therefore, a natural gas pipeline leak explosion of dynamic effects and dangerous areas by the sound development of our city gas pipeline network and accident prevention is of great significance.Through field research, theoretical analysis combined with a computer program developed to study the effect of the natural gas pipeline leak explosion power and the danger zone has been divided. First described the basic theory of the natural gas explosion, summarized several basic form of the gas cloud explosion and the failure criterion to analyze the factors affecting the gas cloud explosion, summarizes the research methods of the gas cloud explosion. The continuity equation, momentum equation, energy equation, equation of state and constitutive equations based on gas diffusion leak model has been divided into natural gas pipeline leakage and diffusion of hazardous area, two examples are out of the discomfort the most dangerous conditions The upper and lower limit of the range of symptoms and natural gas explosion. Second, it proposed the calculation method of the blast in the open space and the constraints, and the establishment of an appropriate mathematical model to solve the natural gas leak to determine the division of the blast to destroy the hazardous area. Analyze the impact of the shock wave factors of the extent of damage, draw a blast with the leak hole diameter leak hole position and the initial value of the pipeline pressure changes in the law. Finally, on the basis of the formula derivation, using Visual Basic software to establish a natural gas pipeline leak blast hazard prediction system, compile a visualization program running under the Windows system, for gas leakage rate calculation and blast the method of calculation of the danger zone, an important guiding significance for urban gas pipe network leak explosion hazard prediction.Figure [31] table [4] reference [55]...