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首页> 外文期刊>Energy Conversion & Management >Experimental investigation on combustion characteristics of premixed propane/air in a micro-planar heat recirculation combustor
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Experimental investigation on combustion characteristics of premixed propane/air in a micro-planar heat recirculation combustor

机译：微平面热循环燃烧器中丙烷/空气预混燃烧特性的实验研究

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摘要

With respect to micro-thermophotovoltaic (MTPV) system, achieving a higher wall temperature and wider range of flame stability in micro-combustor is pivotal, which may be the most effective method to improve the work efficiency of the device. On this basis, an improved combustor with heat recirculation is designed and fabricated. Experimental investigation has been conducted to study the effects of equivalence ratio and volume flow rate on combustion characteristics of premixed propane/air. Results show that the radiation efficiencies of external wall in heat recirculation combustor are significantly higher than the corresponding value in straight-channel combustor under the same conditions. In the meanwhile, the maximum blowout limit in heat recirculation combustor can be more than three times as that of straight-channel combustor. Furthermore, the baffle length is a critical parameter of the micro-combustor, which can determine the residence time and reaction zone of the propane/air mixture. Accordingly, studies under different baffle length cases have been adopted to further explore the most suitable length in heat recirculation combustor. By contrast, the 15 mm baffle length is the most advantageous, in which case the radiation efficiency of the external wall is highest.
机译：对于微热光伏（MTPV）系统，在微燃烧器中实现更高的壁温和更大的火焰稳定性范围至关重要，这可能是提高设备工作效率的最有效方法。在此基础上，设计并制造了一种具有热再循环的改进型燃烧器。已经进行了实验研究以研究当量比和体积流量对预混合丙烷/空气的燃烧特性的影响。结果表明，在相同条件下，热循环燃烧室的外壁辐射效率明显高于直通道燃烧室的相应辐射效率。同时，热循环燃烧器的最大吹出极限可以是直通道燃烧器的三倍以上。此外，折流板长度是微型燃烧器的关键参数，它可以确定丙烷/空气混合物的停留时间和反应区。因此，已采用在不同挡板长度情况下的研究来进一步探索热再循环燃烧器中最合适的长度。相比之下，15 mm的挡板长度是最有利的，在这种情况下，外壁的辐射效率最高。

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