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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,微燃烧器具有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空气系数的增大,外壁面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。
The porous medium burner was designed and the diffusive combustion characteristics of hydrogen and air were experimentally studied. The combustion efficiency, outlet tail gas temperature, outer wall temperature and heat loss rate with combustion thermal power and excess air coefficient were obtained. The experiment found that in a wide operating range, the micro-burner has higher combustion efficiency and exit tail gas temperature, while obtaining a lower outer wall temperature and heat loss rate, and with the increase of combustion heat power and excess air coefficient Large, outer wall temperature and heat loss rate is lower. The results show that the designed small porous medium burner is a kind of burner with wide combustion range, high combustion efficiency and low heat loss rate. It is an ideal choice for the development of micro-combustion turbine power generation system.