设计了微小多孔介质燃烧器，进行了氢气和空气的扩散燃烧特性实验研究，得到了其燃烧效率、出口尾气温度、外壁面温度和热损失率随燃烧热功率和过量空气系数的变化规律。实验发现，在较宽的操作范围内，微燃烧器具肯较高的燃烧效率和出口尾气温度，同时获得较低的外壁面温度和热损失率，而且随着燃烧热功率和过量卒气系数的增大，外壁而温度和热损失率反而越低。结果表明所设计的微小多孔介质燃烧器是一种燃烧范围宽、燃烧效率高、热损失率低的燃烧器，是开发微燃烧透平发电系统的理想选择。
A micro porous media combustor is designed and experimental investigations are performed to study diffusion combustion characteristics of hydrogen gas and air including variations of combustion efficiency, exhaust gas temperature and external wall temperature, heat loss ratio with combustion thermal powers and excess air ratios. It is experimentally indicated that higher combustion efficiency, higher exhaust gas temperature, lower external wall telnperature and lower heat loss ratio can be obtained in the wider combustion operation ranges. Moreover, external wall temperature and heat loss ratio of the micro combustor will reduce contrarily with the increasing of combustion thermal powers and excess air ratios. Therefore, the micro porous media combustor possesses some merits such as wider combustion operation ranges, higher combustion efficiency and lower heat loss ratio and should be an ideal micro combustor for developing the micro gas turbine power generation system.
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