Ignition by Electric Spark and by Laser-Induced Spark of Ultra-Lean CH4/Air and CH4/CO2/Air Mixtures at High Pressure
Ignition by Electric Spark and by Laser-Induced Spark of Ultra-Lean CH4/Air and CH4/CO2/Air Mixtures at High Pressure
复制标题
高压超贫 CH4/空气和 CH4/CO2/空气混合物的电火花和激光诱导火花点火
DOI：
10.1080/00102202.2013.840296
复制
发表时间：
2014
影响因子：
1.9
通讯作者：
N. Chaumeix
中科院分区：
文献类型：
--
作者：
J. Biet;Marie Ndem;M. Idir;N. Chaumeix
本文研究了CH 4/空气和CH 4/CO2/空气混合气体的稀薄可燃极限，采用两种不同的点火装置：放电和激光诱导火花（LIS）。在超贫（0.48 ≤ φ ≤ 0.67）条件下，在不同初始压力（P = 100-700 kPa）和初始温度（298 K）下，对CH 4/空气和（0.6 CH 4 + 0.4 CO2）/空气混合物进行了实验研究。在这些条件下，所有观察到的火焰都在上升。确定了最小点火能量和最大超压。LFL随着初始压力和CO2的加入而增加。
This study investigates the lean flammable limit (LFL) of CH4/air and CH4/CO2/air mixtures, using two different ignition devices: electrical discharge and laser-induced spark (LIS). The experiments were performed for CH4/air and (0.6 CH4 + 0.4 CO2)/air mixtures in ultra-lean conditions (0.48 ≤ φ ≤ 0.67) at different initial pressures (P = 100–700 kPa) and at an initial temperature of 298 K. In these conditions, all observed flames were ascending. The minimum laser pulse energy for ignition (MPE) and the maximum overpressure (MO) were determined. The LFL increases with the initial pressure and with the addition of CO2.