多因素下居民室内天然气泄漏扩散数值模拟

住宅天然气的意外泄漏会对居民造成重大威胁.利用CFD方法模拟分析典型住宅天然气泄漏的燃爆区域影响因素等扩散规律,重点评价了自然通风对减少爆炸风险的作用,并通过实验对模拟结果进行了验证.模拟结果表明:易燃云在空间上部堆积并蔓延到相邻的房间,自然通风是防止天然气积聚、降低泄漏风险的有效方法.

Numerical simulation of natural gas leakage and diffusion in residence space under multiple factors

Accidental leakage of natural gas in residential space can cause significant harm to residents. In this paper, CFD simulation is used to analyze the diffusion law, the explosion area and influencing factors of natural gas leakage in typical residential environment and the role of natural ventilation in reducing the risk of explosion is evaluated. In addition, the simulation results are verified by experiments. The simulation results show that flammable clouds accumulate in the upper part of the space and spread to adjacent rooms. Natural ventilation is an effective way to prevent natural gas accumulation and to reduce the risk of leakage.