单室燃气火灾后果模拟研究

Nmnerical simulation on natural gas fire in a single room

燃气泄漏着火是引发火灾的一个重要原因,其发展过程包括多相湍流流动、燃烧、传热多个分过程。本文将理想单室燃气泄漏火灾的传热传质过程采用CFD(compulational Fluid Dynamics)方法进行了计算机模拟,对其发展规律及危害性进行了深入研究,得出了火场中的流场、泻度场及有害气体浓度场的分布,为定量研究火灾烟气流动过程以及建立不同危险等级的危险区域提出了依据和研究方法。

Natural gas leakage is an important factor resulting in fire. The fire process due to natural gas leakage includes multi-phase turbulence, combustion, heat transfer. This paper emphasized particularly on simulating the contribution of temperature, velocity and toxic gas concentration in gas fire with Compulational Fluid Dynamics. It also study on the development principle of fire and the harm to human. The paper found the distribution of flowfield, temperature field and the harmful air density field in the firefield put forward the basis and reseach methods for the dangerous district and grade.