| 基于急速混合管状火焰技术的丙烷富氧燃烧 |
| |
| 引用本文： | 彭维康,赵晓尧,初庆钊,石保禄,李军伟,王宁飞.基于急速混合管状火焰技术的丙烷富氧燃烧[J].航空动力学报,2017,32(11):2629-2637. |
| |
| 作者姓名： | 彭维康 赵晓尧 初庆钊 石保禄 李军伟 王宁飞 |
| |
| 作者单位： | 北京理工大学 宇航学院，北京 100081 |
| |
| 摘 要： | 采用燃料与氧化剂分别切向注入柱形燃烧室的急速混合管状火焰燃烧技术，开展了丙烷富氧燃烧实验研究，重点分析了火焰结构和燃烧稳定性随氧气摩尔分数xO2的变化规律。丙烷空气实验中，急速混合获得了与预混燃烧相近的均匀稳定层流火焰。以CO2为稀释剂，利用急速混合燃烧分析了不同xO2的火焰特性。结果表明:当xO2≤0.5时，在可燃范围内可获得均匀稳定的管状火焰；xO2=0.6，火焰结构不均匀但仍为稳定层流火焰；xO2增加至0.7时，仅在低当量比下获得了稳定管状火焰，当量比为1.0附近则出现了不稳定燃烧；随着xO2进一步增加，不稳定燃烧范围扩大。实验测量了xO2≤0.4的丙烷可燃界限，相同xO2下N2为稀释剂的可燃范围比CO2的大；且在xO2低至0.125时仍能燃烧，而CO2为稀释剂时此值为0.18。
|
| 关 键 词： | 急速混合 管状火焰 富氧燃烧 丙烷 火焰结构 不稳定燃烧 |
| 收稿时间： | 2016/4/21 0:00:00 |
Oxy fuel combustion of propane based on rapidly mixed tubular flame technology |
| |
| Abstract: | An inherently safe technique of rapidly mixed tubular flame combustion, with the fuel and oxidizer individually injected into a combustor, was adopted to investigate the oxy fuel combustion of propane. The variations of flame structure and combustion stability with oxygen mole fraction were addressed. Based on propane/air combustion, it was found that the rapidly mixed combustion could obtain almost the same flame structure as that of the premixed combustion. Thereafter CO2 was used as the diluent, and combustion tests were conducted under different oxygen mole fractions. Results illustrated that when oxygen mole fraction was no more than 05, a uniform and stable tubular flame can be established from lean to rich limit; by increasing oxygen mole fraction to 06, the laminar flame became non uniform in structure, however, the flame was stable; by raising oxygen mole fraction to 07, the stable tubular flame was merely obtained at lean combustion, and oscillatory combustion appeared when the equivalence ratio of 1.0. By further increasing oxygen mole fraction, the oscillation region was expanded. The combustion range for propane/oxygen mixture diluted by N2 and CO2 was examined when oxygen mole fraction was no more than 04. It was found that the flammable range diluted by N2 was wider than that diluted by CO2, and the minimum oxygen mole fraction to sustain propane/oxygen combustion diluted by CO2 was 018, higher than that of 0125 diluted by N2. |
| |
| Keywords: | rapidly mixed tubular flame oxy-fuel combustion propane flame structure oscillatory combustion |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
|
