CAJ | 학술논문

针对天然气管道穿孔泄漏扩散问题，结合有限容积法，建立了天然气管道不同泄漏位置的C FD仿真模型，分别对天然气管道上部、下部、迎风侧及背风侧等4种工况的泄漏扩散进行了数值模拟。研究结果表明，下部泄漏比上部泄漏气体更贴近地面且不易扩散，且横向危险范围也比上部泄漏大30～70 m ；迎风侧泄漏与背风侧泄漏情况相似，但迎风侧泄漏危险区域的纵剖面面积更大，更危险。应用数值方法模拟管道穿孔扩散问题，给出了不同工况下的泄漏范围，为天然气管道泄漏的安全输送及安全抢修提供了理论依据。
침대천연기관도천공설루확산문제，결합유한용적법，건립료천연기관도불동설루위치적C FD방진모형，분별대천연기관도상부、하부、영풍측급배풍측등4충공황적설루확산진행료수치모의。연구결과표명，하부설루비상부설루기체경첩근지면차불역확산，차횡향위험범위야비상부설루대30～70 m ；영풍측설루여배풍측설루정황상사，단영풍측설루위험구역적종부면면적경대，경위험。응용수치방법모의관도천공확산문제，급출료불동공황하적설루범위，위천연기관도설루적안전수송급안전창수제공료이론의거。
To study the diffusing of gas piercing leakage ,finite volume method is used to establish CFD simulation model that detects different locations where gas pipes leak and four styles of diffusing ,leakage of the upper ,lower ,windward and leeward side of the pipeline ,were numerically simulated .According to the research ,the leakage of lower is closer to the ground and diffuses less easily than the upper leakage ,which has a 30~70 m larger dangerous area of cross range section .The leakage of windward side is similar to the leeward side ,but the lengthwise section area of the former leakage is larger and more dangerous than the latter .And this simulation of leakage area provides theoretical base for safety transportation of gas and security maintenance of pipelines .