中文摘要：

为优化燃烧室,设计加工了内径2.4 mm、外径3.0 mm的多种不同孔隙率的多孔介质结构微燃烧室,并在燃烧室内实现了氢氧混合气的稳定燃烧。改变氢氧体积混合比和混合气入口流量,对多孔介质微燃烧室进行了相关试验,分析了各种条件下微燃烧室的燃烧情况及外壁面的温度分布。研究结果表明,这些因素对混合气在微燃烧室内的燃烧有重要影响。多孔介质燃烧室在孔隙率为0.50,混合气入口流量为750 cm3/min,氢氧体积混合比为2∶1时燃烧效果较好,外壁面温度高且分布均匀,适合微热光电系统的应用。

英文摘要：

To improve the efficiency of the micro-thermophotovoltaic system,the radiation energy output of micro-combustor has to be uniform and possibly in the short-wave photon energy range,which requires high and uniform temperature along the micro-combustor＇s external wall.In order to further optimize the micro-combustor,different porous media combustors with the inner and external diameters of 2.4mm and 3.0mm were designed.After stable combustion of hydrogen and oxygen in the porous media combustors,experimental investigation was carried out against micro-combustor with different hydrogen-oxygen volume ratios,mixing gas flux and porosity,the combustion performance and external wall temperature distribution under different conditions were analyzed.The results indicated that the porosity,mixing gas flux and hydrogen-oxygen volume mixing ratio had significant effect on the mixture combustion in micro-combustor.When the porosity,mixing gas flux and hydrogen-oxygen volume mixing ratio were separately 0.50,750cm3/min and 2∶1,the micro-combustor showed a better combustion performance,including high and uniform temperature distribution along the external wall of micro-combustor,which was suitable for application to micro-thermophotovoltaic system.