Numerical investigations on thermal performance and flame stability of hydrogen-fueled micro tube combustor with injector for thermophotovoltaic applications
Numerical investigations on thermal performance and flame stability of hydrogen-fueled micro tube combustor with injector for thermophotovoltaic applications
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DOI：
10.1016/j.ijhydene.2022.03.225
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发表时间：
2022-04
影响因子：
7.2
通讯作者：
W. Zuo;Hong Zhao;J. E.;Qingqing Li;Dexin Li
中科院分区：
文献类型：
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作者：
W. Zuo;Hong Zhao;J. E.;Qingqing Li;Dexin Li
为了设计一种具有良好热性能和火焰稳定性的热光伏应用微型管燃烧室，本文对后向台阶和带引射器的氢燃料微型管燃烧室的热性能和火焰稳定性进行了比较。结果表明，直径比d ~ 2/d ~ 1的减小导致对称回流区扩大，有利于流体和热量的循环，火焰位置升高，不利于火焰稳定。此外，还分析和讨论了直径比d2/d1对热性能和火焰稳定性的影响。结果表明，当直径比d2/d1从0.9减小到0.8时，在较低的氢/空气当量比下，喷射器对热性能的正效应增强，火焰稳定性提高。最后得出了带引射器的微型燃烧室的应用条件。本文的研究工作对设计带引射器的微管燃烧室具有重要的参考价值。
In order to design a micro tube combustor with good thermal performance and flame stability for thermophotovoltaic applications, in this work, thermal performance and flame stability of hydrogen-fueled micro tube combustors with backward facing step and with injector are compared. It is found that the decrease of diameter ratiod2/d1leading to expansion of the symmetrical recirculation zone, which is helpful for fluid and heat circulation, and higher flame locations, which is not helpful for flame stabilization. Furthermore, effects of diameter ratiod2/d1on thermal performance and flame stability are analyzed and discussed. Results suggest that when the diameter ratiod2/d1is decreased from 0.9 to 0.8, positive effects of injector on thermal performance are enhanced and flame stability is improved under lower hydrogen/air equivalence ratio. Finally, the applications conditions of the micro tube combustor with injector are achieved. This work will provides us significant reference for designing micro tube combustor with injector.