中文摘要：

针对微热光电系统,设计了4种结构的平行板燃烧室,在考虑辐射表面温度分布的不均匀性和空间辐射角系数的前提下,构建了系统能量转换模型并编制了相应的计算程序。通过计算得出不同结构的平行板燃烧室对系统能量转换的影响,重点分析了喷口形状、多孔介质、催化剂的使用等条件改变时辐射外壁面的温度分布、辐射能光谱分布、各子环节效率和系统整体电能输出。结果表明：在微燃烧室中,多孔介质的填充、扩展型喷口的开设、催化剂的使用均能提高其外壁面的平均温度,同时也能改变温度分布特别是最高温度区域的位置,这也导致单色辐射力和有效辐射能均依次增加;基于3种改进结构燃烧室的系统在能量转换的各方面均优于采用圆形喷口直通道燃烧室的系统,其中扩展型喷口内部催化结构的燃烧室在相同燃料输入时能使系统整体效率提高56.6%,功率密度达到0.87W/cm3.

英文摘要：

Four different plane cell combustors were designed for the micro-thermophotovoltaic system,corresponding energy transition models were constructed and the calculation program was developed,considered the non-uniformity of wall temperature distribution and the radiation view factors.The effects of combustor structures on the energy transition were calculated and the wall temperature distribution,spectrum distribution of radiation energy,efficiency of each part and the electric power output were analyzed when the nozzle shape,porous media and catalyst surface were changed.The results show that the filling of porous media,using of expanding nozzle and catalyst surface can all increase the average wall temperature,change the temperature distribution especially the high temperature area position,thus,the spectrum radiation force and effective radiation energy are improved also.All energy transition aspects of the three systems using the improved combustor structures are better than the round nozzle one,and the system that uses the expanding nozzle and catalyst surface can increase the total efficiency by 56.6% for the same fuel,and its power density can reach to 0.87W/cm3.