高温高压下掺氢天然气的燃烧特性

被引:10
作者
常铭
苗海燕
刘岩
路林
黄佐华
蒋德明
机构
[1] 西安交通大学动力工程多相流国家重点实验室
关键词
天然气; 氢气; 层流燃烧速率; 马克斯坦长度;
D O I
10.16236/j.cnki.nrjxb.2010.06.010
中图分类号
TK407.9 [燃料、润滑料];
学科分类号
080707 [能源环境工程];
摘要
在定容燃烧弹内研究了高温(450,K)、高压(0.75,MPa)条件下天然气-氢气-空气混合气的火焰传播过程,获得了不同掺氢比和不同当量比下掺氢天然气的无拉伸层流燃烧速率,并分析了火焰的稳定性。结果表明,高温高压下随着掺氢比的增加,掺氢天然气的燃烧速率增加,且增长速率逐渐加快;马克斯坦长度则随着掺氢比的增加而减小,即火焰的稳定性下降。随着当量比的增加,无拉伸层流燃烧速率呈现先增大后减小的趋势,且最大无拉伸层流燃烧速率所对应当量比的位置随着掺氢比的提高而向浓混合气移动;马克斯坦长度随当量比的增加而增大,即火焰稳定性随当量比的增加而提高。
引用
收藏
页码:481 / 487
页数:7
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