低热值气体燃料层流燃烧特性  

Laminar combustion characteristics of low calorific value gas fuel

作　　者：郑士卓[1] 张欣[1] 白银环[1] 许健[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《北京交通大学学报》2011年第1期108-112,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(50676008);北京交通大学优秀博士生科技创新基金资助(141086522)

摘　　要：在定容燃烧弹中开展了当量比、燃料组分、初始压力对低热值气体燃料层流燃烧特性影响的试验研究,建立了准维双区模型,基于在定容弹内实测的压力曲线,计算了规范化质量燃烧率.研究结果表明:燃料中氮气比例的增加导致压力峰值降低,火焰发展期和燃烧持续期增长;化学计量比附近的燃料燃烧进行的较充分,压力峰值最高,火焰传播速率最快,燃烧持续时间短;初始压力的增加使质量燃烧率下降,燃烧持续期有所延长.The effects of equivalence ratio,nitrogen fraction and initial pressure on the laminar combustion characteristics were studied experimentally by using a constant volume combustion bomb.A quasi-dimensional model for predicting normalized mass burning rate was proposed.The results show that with the increase of nitrogen fraction,the peak pressure will decrease,the flame development duration and combustion duration will increase.The fastest normalized mass burning rate and the shortest combustion duration are found at the equivalence ratios near the stoichiometric equivalence ratio.With the increase of initial pressure, the normalized mass burning rate will decrease and the combustion duration will increase.

关 键 词：低热值气体燃料 层流燃烧特性 定容燃烧弹 

分 类 号：TK16[动力工程及工程热物理—热能工程] V231.12[航空宇航科学与技术—航空宇航推进理论与工程]