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内置错列挡板式微型燃烧器的工作特性

     

摘要

为提高微型热光电系统的输出性能,本文设计了一种内置错列挡板的平板式微型燃烧器,并通过构建的三维计算模型,研究了其工作过程的基本特征以及挡板间距和位置等结构参数的影响.研究结果表明:直通道内部设置挡板后,得益于换热效果的增强,辐射壁面的温度值和均匀性都有一定程度的提升;在2~5 mm的挡板间距范围内,每缩小1 mm,壁面温度约能提高17 K;挡板初始设置点则对壁面高温区域的分布形态和均匀性有直接影响,在4 mm时燃烧器工作效果最佳.%To improve the output performance of a micro-thermophotovoltaic system, a new type of planar microcom-bustor inlaid with staggered baffles was proposed.A 3D CFD model was established to study the basic characteris-tics of the working process and the effects of structural parameters, such as distance of baffles and position.When baffles were arranged inside the combustor, the temperature and uniformity of the external wall rose to a certain de-gree due to the enhancement of heat exchange.Within the baffle interval of 2~5 mm, the wall temperature incre-ment reached 17 K when the interval decreased by 1 mm.The initial position of baffle arrangement had a direct effect on both distribution pattern of high temperature zone and distribution uniformity of total radiation wall.The working effect of the combustor was optimal at 4 mm.

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