中文摘要：

设计了一个通道截面为7mm×0．6mm的等速螺线过量焓微燃烧器，并在其中完成了CH4／空气预混气的燃烧实验．通过数据采集系统得到了微燃烧器端面的温度分布，使用气相色谱法分析了烟气成分．实验结果表明，过量焓燃烧器能够通过逆流换热有效地实现热量回收，提高可燃预混气进入燃烧区前的温度，有利于微尺度火焰的稳定，并在较宽的空气过量系数范围内实现甲烷／空气预混气在燃烧器的中心稳定燃烧．当空气过量系数大于1时，甲烷可以实现完全燃烧；当空气过量系数小于1时，烟气中存在H2和CO，但无残留的甲烷。

英文摘要：

A spiral excess enthalpy combustor with the channel section of 7 mm × 0.6 mm was designed, in which premixed CH4/air was burned. The temperature distribution on one sidewall of the combustor was measured and an analysis of burned products has been made. The experimental results show that the excess enthalpy combustor can effectively recycle heat from burned gas through counterflow heat transfer and raises the temperature of unburned gas, which is advantageous to flame stabilization in micro channels and extends the combustion limit of premixed CHa/air. The premixed CHJair flame can be stabilized in the center of the eombustor. When air excess coefficient is larger than 1.0, CH4 can completely react with air. When air excess coefficient is smaller than 1.0, unburned H2 and CO can he detected in products.