微管内氢气燃烧变参数研究  

Changing parameters of hydrogen combustion in micro-scale tube

作　　者：李玉兰[1,2] 王谦[1] 

机构地区：[1]江苏大学能源与动力学院,江苏镇江212003 [2]江苏联合职业技术学院镇江机电分院,江苏镇江212016

出　　处：《热科学与技术》2009年第1期85-89,共5页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(50576032)

摘　　要：针对微尺度燃烧的特点,在传热分析的基础上,建立了微型管内氢-空气预混合气的燃烧模型,对0.2mm微管内氢气空气预混燃烧进行了变参数研究。结果表明:对于0.2 mm微管,适当的氢氧混合比,火焰可以实现稳定持续燃烧;燃烧室尺度越小,散热量越大,最大可达到总放热量的22%左右;当量比接近0.8时,有最高燃烧温度和最高的氢气转化率,接近100%;入口应该控制在较小流速来实现较高的燃烧效率。On the base of analysis of heat transfer, combustion model of hydrogen and air premixed in micro-scale tube was established in consideration of characteristics of micro-scale combustion. The effects of changing parameters on combustion characteristics of hydrogen and air premixed combustion in micro-scale tube was studied with simulation methods. The results indicate： Stabilized combustion in micro tube can be maintained stably in micro-scale tube with 0.2 mm inner diameter with suitable hydrogen-air equivalence ratio. And the smaller the combustion chamber dimensions are, the larger the heat loss will be, and the largest is 22% of the heat of reaction; The hydrogen-air equivalence ratio near 0.8 is helpful for keeping stability combustion; Inlet velocity should be controlled at small velocity to achieve higher combustion efficiency.

关 键 词：微燃烧 燃烧特性 数值模拟 传热模型 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程]