研究目的
To improve thermophotovoltaic system efficiency by proposing a porous media combustor with a bluff-body as the flame holder and examining its effects on mean wall temperature and system efficiency.
研究成果
The planar porous media combustor with a bluff-body flame holder shows better performance regarding system efficiency and the blowout limit. The system efficiency with the bluff-body is increased by 14.72% as compared to the one without the bluff-body at ? = 0.8, vin = 4 m/s. The extended blowout limit is attributed to the flow recirculation zone and heat recirculation by the wall, porous solid matrix, and the bluff-body.
研究不足
The study is limited to a two-dimensional numerical simulation and does not account for three-dimensional effects. Additionally, the simulation assumes laminar flow and neglects gas radiation and catalytic effects.
1：Experimental Design and Method Selection
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.
2：Sample Selection and Data Sources
Premixed hydrogen/air was introduced into the channel and ignited inside the channel to release chemical energy.
3：List of Experimental Equipment and Materials
A planar porous media combustor with a bluff-body flame holder was used. The combustor was characterized by a micro-channel filled with inert porous media (steel mesh).
4：Experimental Procedures and Operational Workflow
Premixed hydrogen/air was introduced into the channel and ignited inside the channel to release chemical energy. Part of the released heat was emitted through the combustor wall by radiation and convection. The rest of the heat was lost with the exhaust.
5：Data Analysis Methods
Numerical results were analyzed to examine the effects of the bluff-body flame holder on mean wall temperature and system efficiency.
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