Heat transfer characteristics of porous radiant burners

Journal Article · Wed May 01 04:00:00 EDT 1991 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910578· OSTI ID:5327466

Tong, T W; Sathe, S B ^[1]

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1. Arizona State Univ., Tempe (USA)

This paper reports a numerical study of the heat transfer characteristics of porous radiant burners, which have significant advantages over conventional burners. The heat transfer characteristics are investigated using a one-dimensional conduction, convection, and radiation model. The combustion phenomenon is modeled as spatially dependent heat generation. Nonlocal thermal equilibrium between the gas and solid phases is accounted for by using separate energy equations for the two phases. The solid matrix is assumed to emit, absorb, and scatter radiant energy. The spherical harmonics approximation is used to solve the radiative transfer equation. The coupled energy equations and the radiative transfer equations are solved using a numerical iterative procedure. The effects of the various factors on the performance of porous radiant burners rae determined. It is revealed that for a given rate of heat generation, large optical thicknesses and high heat transfer coefficients between the solid and gas phases are desirable for maximizing radiant output. Also, low solid thermal conductivities, scattering albedos and flow velocities, and high inlet environment reflectivities produced high radiant output.

• DOE Contract Number: FG02-87ER13697
• OSTI ID: 5327466
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 113:2; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BURNERS
CALCULATION METHODS
CHEMICAL REACTIONS
COMBUSTION
CONVECTION
ENERGY TRANSFER
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
OXIDATION
RADIANT HEAT TRANSFER
SPACE DEPENDENCE
THERMAL CONDUCTION
THERMOCHEMICAL PROCESSES