考虑真实埋地环境的天然气管道泄漏CFD分析及计算模型的建立（外文翻译）

附录ACFD analysis and calculation models establishment of leakage ofnatural gas pipeline considering real buried environmentFanxi Bu,Shuangqing Chen,Yang Liu,Bing Guan,Xingwang Wang,Zechang Shi,Guangwei HaoARTICLE INFOABSTRACTAr业MDifferent from the above ground pipeline,the soil characteristics and ground conditians have a greatimpact on the risk of leakage accident for butied natural gas pipeline.In this paper,the effects ofground couditious and soil characteristics on methane leakage and diffusion were studied by usingAvailable cnline 17 March 2022numerical simultion.The two processes of methane leakage and diffusion.the methane leakage rateand the methane diffusion Early Warning Boundary (EWB)were investigated Finally.based on theKeywwds.least sqquare method and multiple regression theory.the madels of methane leakage rateNatural gasand FWH were established.The results showed that:(ompared with Unhardened Surfare (roundLeakege and difusionUHSG)condition,Hardened Surface Ground (HSG)increased the distribution of pressure,velocity andCround cnditionsmethane conceutration in soil.The viscous resistance coelficieut and inertial resistance coefficient ofLeakage ratesoil had a great influence on the methane leakage rate,while the giound conditious did not.BothCalculaticn modelsground conditions and soil characteristics had a certain impact on the EWB of methane diffusion.The average error of methane leakage rate direct calulation model was 4.48%,and the average errarof EWB calculation madel under H5G and UHSG condition was 3.59*and 7.77%resperrively.Themethane leakage rate and the EWB calculation models suggest the soil characteristics as independentvariables and can provide the rapid calculation of leakage rate and EWB under any soil characteristicswithout the help of computer iterative solution.The methane leakage rate direct calculation modelmakes up for the vacancy of calculation method of leakage rate of buried pipeline under different soilcharacteristics.2022 The Author(s).Published by Elsevier Ltd.This is an open access artide under the CCBY-NC-NDlicense (http:/creativecommans.orgjlicenses/by-nc-nd4.0/).1.Introductionpipeline is the most common way for natural gas transporta-ton(山et aL,2021cCompared with other fossil energy sources,natural gus hasHowever,due to rhe concealment of huried pipeline layingthe advantages of large reservoirs and clean combustion (anleakage accidents often occur due to corrosion,natural disasterset al.2014:Gallagher et al,2015).With the conuinuous nalurityand brutal construction (Li et al 2014).Greenhouse gas methaneof seabed combustible ice mining technology,natural gas hasis the main component of natural gas,and 31 of the world'sbecome the first dhoice for indusuid and civil [uels (Kan et al.merhane emissions come from oil and natural gas systems (Ral-2018).The properties of natural gas such as good fluidity.lowcombe et al..2018;Anifowosc and Odubela.2015).The leakagedensily nd suong compressibility enable its pipel