CAJ | 학술논문

针对城市埋地天然气管道穿孔泄漏扩散问题，结合有限容积法，利用Gambit 2．4建立了天然气管道不同泄漏位置的CFD仿真模型，利用Fluent 6．3分别对天然气管道上部、下部及背风侧3种泄漏工况下，气体在土壤中和空气中的扩散规律进行了数值模拟。研究结果表明，下部泄漏在土壤和空气中的危险范围最大，关闭泄漏管段两端阀门以后，气体扩散危害范围逐渐变小。研究结果为城市埋地天然气管道泄漏事故现场人员疏散及安全抢修提供了理论依据。
침대성시매지천연기관도천공설루확산문제，결합유한용적법，이용Gambit 2．4건립료천연기관도불동설루위치적CFD방진모형，이용Fluent 6．3분별대천연기관도상부、하부급배풍측3충설루공황하，기체재토양중화공기중적확산규률진행료수치모의。연구결과표명，하부설루재토양화공기중적위험범위최대，관폐설루관단량단벌문이후，기체확산위해범위축점변소。연구결과위성시매지천연기관도설루사고현장인원소산급안전창수제공료이론의거。
To study the diffusing of gas piercing leakage in urban buried gas pipeline ,combi-ning the finite volume method ,CFD simulation models are established by Gambit 2 .4 at different leakage locations .The diffusion rule of gas in soil and air are simulated by Fluent 6 .3 under the three leakage conditions of the upper ,lower and leeward side of the gas pipeline .The research result shows that the lower leakage in soil and air is the largest diffusion hazard area .If the valves at both ends of the pipeline are shut off ,the gas diffusion hazard area will gradually get smaller .T he studies can also provide the theoretical foundation for the personnel evacuation and security maintenance of pipelines in the scene of natural gas release .