全预混表面式燃烧器掺混结构实验研究

天然气全预混表面式燃烧器具有燃烧效率高、氮氧化物排放低的优势,因此,近年来全预混表面式燃烧器在小型天然气锅炉中得到了广泛的应用。天然气和空气掺混结构性能是决定全预混表面式燃烧器性能的关键因素,本文对采用文丘里和旋流叶片组合形式掺混结构的全预混表面式燃烧器进行了试验研究,获得了不同负荷下3种方案掺混结构的燃烧器氮氧化物排放特性,为全预混表面式燃烧器掺混结构的设计和优化提供了试验数据支撑。

Surface Fires： No Wind, No Slope, Marginal Burning

The first aim of this work is to provide an analytical expression to calculate the rate of spread of surface fires under no wind and no slope conditions. A previous simplified model was improved for this particular case of fire propagation. The test of this proposed model was performed by using two complete sets of experimental results with several fuel beds and variable parameters such as moisture content or bulk density. The second aim of this article is to highlight two conditions that allow stopping a fire： the low leaf area and the high value of the moisture content.