In order to address the issue about the low output power of the micro-thermophotovoltaic system, in this work, the inlets of the traditional micro planar combustor are modified into injectors for better thermal performance and higher output power of the micro-thermophotovoltaic system. The thermal performance of traditional and modified micro planar combustors is numerically investigated and compared. It is found that the thermal performance of the modified micro planar combustor is greatly enhanced with the help of the injectors. This is due to that the reduction of the step diameter leads to the rise of the velocity of the inlet flow, resulting in the chemical reaction zone is closer to the center of the combustion chamber in the micro planar combustor. Furthermore, the positive effects and negative effects on thermal performance enhancement brought by the reduction of the step diameter of injectors are vividly discussed under different hydrogen mass flow rate, hydrogen/air equivalence ratio and solid wall material. Finally, some guidelines are proposed for the applications of the micro planar combustors with injectors in the micro-thermophotovoltaic system. This work provides us a simple and practical way to address the issue about the low output power of the micro-thermophotovoltaic system.

中文翻译：

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用于微热光伏应用的带喷射器的氢燃料微平面燃烧器热性能增强的数值研究

为了解决微热光伏系统输出功率低的问题，本工作将传统的微型平面燃烧器的进气口改造为喷射器，以提高微热光伏系统的热性能和更高的输出功率。对传统和改进的微型平面燃烧器的热性能进行了数值研究和比较。结果表明，在喷射器的帮助下，改进的微平面燃烧器的热性能大大提高。这是由于台阶直径的减小导致入口流速度的增加，导致在微平面燃烧器中化学反应区更靠近燃烧室的中心。此外，生动地讨论了在不同氢气质量流量、氢气/空气当量比和固体壁材料下，减小喷射器台阶直径对热性能增强的积极影响和消极影响。最后，对带喷射器的微型平面燃烧器在微热光伏系统中的应用提出了一些指导意见。这项工作为我们解决微热光伏系统输出功率低的问题提供了一种简单实用的方法。