Radiative and convective heat transfer in a cylindrical enclosure for flow of a gas-soot mixture
A study was initiated to develop a model to describe the transport processes in energy generation units as represented by a cylindrical enclosure. Interaction of radiative and convective transfer is considered for hydrodynamically fully developed laminar and turbulent flow of a radiatively participating gas through a black wall duct with specified wall temperatures. The gas is composed of absorbing gases and soot particles. All properties except those applicable to the radiant exchange process are constant. Gas temperature profiles and wall heat fluxes are sought utilizing the zone method to describe the radiant exchange process with radiative properties of a gas mixture furnished by the weighted sum of gray gases model with separate absorbing gases and soot models. The analysis demonstrates that gas temperature and wall heat flux depend on the boundary conditions and several parameters, namely, mean velocity, gas thermal conductivity, duct diameter, volumetric heat generation, length to tube diameter ratio, and absorbing gases and soot radiative properties. Results are presented for some values of the governing parameters and different boundary conditions.
- Research Organization:
- Iowa Univ., Iowa City (USA)
- OSTI ID:
- 5131627
- Country of Publication:
- United States
- Language:
- English
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