CAJ | 학술논문

针对架空天然气管道泄漏引起的火灾爆炸问题，采用事件树分析泄漏扩散引起的事故后果，并在数值模拟中着重分析了模拟数学模型的选择。在三种不同泄漏孔径、两种不同风速、两种不同运行压力条件下分别应用ALHOA软件对事故后果进行数值模拟，结果表明：泄漏孔径、运行压力与危害影响范围成正比关系；在闪火和蒸气云爆炸中，风速与危害影响范围成反比关系，而风速对射流火灾的热辐射范围基本没有影响。
침대가공천연기관도설루인기적화재폭작문제，채용사건수분석설루확산인기적사고후과，병재수치모의중착중분석료모의수학모형적선택。재삼충불동설루공경、량충불동풍속、량충불동운행압력조건하분별응용ALHOA연건대사고후과진행수치모의，결과표명：설루공경、운행압력여위해영향범위성정비관계；재섬화화증기운폭작중，풍속여위해영향범위성반비관계，이풍속대사류화재적열복사범위기본몰유영향。
Aiming at the problems of fire and explosion caused by gas leakage and diffusion of overhead natural gas pipelines, the event tree was adopted to analyze the accident consequence of gas leakage and diffusion, and the choice of mathematical model was analyzed emphatically in the numerical simulation.Then the simulation was car-ried out with three leakage apertures, two pipeline operating pressures and two ambient wind velocities to study the accident consequence by ALOHA software.The results showed that the hazard influence scope is positively correla-ted to the leakage aperture and operating pressure.Besides, the hazard influence scope is inversely proportional to the wind speed in the simulation of flash fire and vapor cloud explosion, and the wind speed has no effect on ther-mal radiation range of jet fire basically.