To improve thermophotovoltaic system efficiency, a porous media combustor with a bluff-body as the flame holder was proposed. A two-dimensional numerical simulation of premixed hydrogen/air combustion inside a planar porous media channel with the local thermal non-equilibrium model was conducted. Effects of the bluff-body flame holder on mean wall temperature and system efficiency were examined. By inserting the bluff-body, the blowout limits of the planar porous media combustor for $\varphi$= 0.6, 0.8, 1.0, 1.2 are increased by 33%, 19%, 12%, 20%, respectively. Numerical results show that the flame stabilization is dominated by flow and heat recirculation. Further analysis reveals the mechanism of heat transfer on flame stabilization due to three heat recirculation paths. Considering the view factor and the external quantum efficiency, the system efficiency with the bluff-body is increased by 14.72% as compared to the one without the bluff-body at $\varphi$=0.8, v_in = 4 m/s.

为了提高热电系统的效率，提出了一种以钝体作为火焰保持器的多孔介质燃烧器。利用局部热非平衡模型，对平面多孔介质通道内的氢/空气混合燃烧进行了二维数值模拟。检查了钝体火焰保持器对平均壁温和系统效率的影响。通过插入钝体，平面多孔介质燃烧器的喷出极限为$\varphi$= 0.6、0.8、1.0、1.2分别增加了33％，19％，12％，20％。数值结果表明，火焰稳定度受流动和热循环的支配。进一步的分析揭示了由于三个热再循环路径，传热对火焰稳定的机理。考虑到视角因素和外部量子效率，具有钝态体的系统效率与没有钝态体的系统效率相比提高了14.72％。$\varphi$= 0.8，V _in = 4 m / s。