Extinction and stabilization of a diffusion flame on a flat combustible surface with emphasis on thermal controlling mechanisms
Extinction and stabilization of a diffusion flame on a flat combustible surface with emphasis on thermal controlling mechanisms
复制标题
平坦可燃表面上扩散火焰的熄灭和稳定，重点是热控制机制
DOI：
10.1080/00102208708947042
复制
发表时间：
1987
影响因子：
1.9
通讯作者：
A. Fernandez
中科院分区：
文献类型：
--
作者：
H. Kooama;K. Miyasaka;A. Fernandez
本文从理论上详细研究了在平行于燃料表面的对流氧化混合气流中，在平坦可燃表面上扩散火焰的熄灭和稳定过程，并在实验上作了简化。的Navier-Stokes椭圆守恒方程组，包括有限速率动力学，数值求解，分析其前缘附近的火焰的结构，并计算作为气体流的速度和氧气浓度的函数的熄灭或稳定距离。用全局一步化学反应描述了反应动力学机制。因此，分析强调控制消光过程的热物理机制。对代表性固体可燃物（PMMA）和液体燃料（庚烷）进行计算。实验是在小型燃烧风洞中进行的。本文测量了稳定在多孔垂直表面上的庚烷火焰的熄灭距离。
Abstract The process of extinction and stabilization of a diffusion flame on a flat combustible surface in a mixed convective, oxidizing, gas flow parallel to the fuel surface is studied theoretically in detail and in a more simplified approach experimentally. The Navier-Stokes elliptic set of conservation equations, including finite rate kinetics, is solved numerically to analyse the structure of the flame near its leading edge and to calculate the extinction or stabilization distance as a function of the velocity and oxygen concentration of the gas flow. A global one-step chemical reaction is used to describe the chemical kinetic mechanisms. The analysis, therefore, emphasizes the thermo-physical mechanisms controlling the extinction process. The calculations are performed for a representative solid combustible (PMMA) and liquid fuel (heptane). The experiments are performed in a small scale combustion tunnel. The extinction distance for a Heptane flame, stabilized on a porous, vertical surface, is measu...