B207 ENHANCEMENT OF RADIATION EMISSION CHARACTERISTICS OF A POROUS BURNER(Combustion-5)

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概要

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• To improve radiation emission characteristics of a single-layered porous burner, the heat-recirculating porous burner constructed by two sections of porous materials with different porosities and pore per inch (PPI) were investigated experimentally and theoretically. The improved porous emitter or the second section was installed downstream of a single-layered porous burner (first section) in which dividing distance between two surfaces of porous materials was restricted at 30 mm. As this structure of the present burner, a multi-layered porous burner is defined. In the analysis, the energy liberation due to combustion and the effects of radiation were considered in the energy equations for the gas and solid phases. We assumed that the chemical kinetics of gas-phase reactions were governed by a single-step Arrenius rate expression of methane-air premixed combustion. To evaluate the radiative transports in the solid-phase energy equation, the P_1 approximation was used to solve the equation of transfer for the radiation field in the porous burner and porous emitter. Ni-Cr open-cellular porous material, where porosity and PPI are 0.93 and 21.5 respectively, was selected as a porous burner, and three kinds of Ni-Cr open-cellular ones with different physical characteristics were used as the improved porous emitters. Radiant output from the multi-layered porous burner was measured based on a two-color radiometry. Comparison between predicted and measured results of the forward radiative heat flux and the porous surface temperatures were satisfactory agreement: the validity of the present theoretical model for predicting the radiation from the present porous burner was confirmed.

• 2009-11-16

著者

• Saito Shinichi

  High-temperature Heat Transfer Laboratory Department Of Mechanical And Energy System Engineering Oit

• KRITTACOM Bundit

  Heat Transfer and Combustion in Porous Media Laboratory (HC-POM), Department of Mechanical Engineeri

• Krittacom Bundit

  Heat Transfer And Combustion In Porous Media Laboratory (hc-pom) Department Of Mechanical Engineerin

• Krittacom Bundit

  Heat Transfer And Combustion In Porous Media Laboratory (hc-pom) Department Of Mechanical Engineerin

関連論文

• B214 THE COMBUSTION OF LIQUID FUELS USING A PACKED BED(Combustion-7)
• B207 ENHANCEMENT OF RADIATION EMISSION CHARACTERISTICS OF A POROUS BURNER(Combustion-5)

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