研究了在高压环境下压力对液体燃料的碳烟的层流扩散火焰碳烟生成的影响.利用激光诱导炽光和消光法相结合的方法,获得了层流扩散火焰的碳烟分布二维图像,测量和分析了正庚烷的层流扩散火焰的碳烟体积分数生成随压力变化的规律.然后,引入特别设计的“滴入式火焰”装置,该设计为两种以上液体混合燃料的层流扩散火焰碳烟生成的测量提供了保障.最后,定量地分析和对比了饱和环状分子结构(环己烷和环己醇)和直链分子结构(正己烷和1-己醇)的液体燃油的层流扩散火焰的碳烟生成趋势,结果表明,环状分子结构燃油的碳烟生成倾向要强于它们对应的线性分子结构的燃油.
This research focuses on the effects of an increasing pressure on the soot formation during combustion of vaporized liquid fuel.Firstly,soot formation is measured in a laminar diffusion flame of n-heptane up to 3.0 bar.The soot volume fraction in the diffusion flames has been measured using Laser Induced Incandescence (LⅡ) calibrated by means of the Line of Sight Attenuation (LOSA) technique.The 2-D images of soot distributions have been captured,and the integral soot volume fractions show power law dependence on pressures.Secondly,a specially designed High fueling system (called "doped flame") is presented in this paper.This setup allows for soot measurements in laminar diffusion flames of liquid fuel blends at elevated pressure.Fuels with two typical molecular structures,namely linear and saturated cyclic hydrocarbons,are examined in both non-oxygenated (n-hexane and cyclohexane) and oxygenated form (1-hexanol and cyclohexanol).The experiment data suggests that soot is more prevalent for cyclic structures relative to their linear counterparts.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%