Study On Leakage Diffusion Flow Model Of Urban Gas Pipeline

In the background of China's economic and social development,urban natural gas pipeline network are distributed in the population and building centralized place,which makes the urban natural gas has become the most serious consequences of the accident,flammable explosive gas could be one of the most frequent.Understanding the law of leakage and diffusion of natural gas can control the leakage accident in a timely manner,and at the same time,it can also predict and evaluate leakage accidents.This paper established the urban natural gas pipeline leakage diffusion model,firstly using fluid mechanics analysis of the basic theory,and then the simulation based on the CFD value,finally using the similarity principle to establish the experimental model and experimental measurements.The use of engineering thermodynamics and fluid mechanics basic formulas of three kinds of leakage model(hole model and pipe hole model and the pipe model)formula,and calculate the amount of leakage of urban high pressure gas leakage accident in different conditions by using Matlab mathematical software,gathered in the table,to provide reference for the following research.Through theoretical analysis and combined with the reality of the actual situation,establish geometric model of urban streets under the mode of natural gas pipeline leakage and diffusion,simulation based on the CFD value,get the general rule of leakage and diffusion.CFD was used to simulate the leakage and diffusion of gas at different time,different aperture,and different height of obstacles.The influence of different factors on the leakage and diffusion of natural gas was analyzed.