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Experimental Validation of Numerical Model for Turbulent Flow in a Tangentially Fired Boiler with Platen Reheaters  

Zheng, Chang-Hao (State Key Laboratory of Coal Clean Combustion, Tsinghua University)
Xu, Xu-Chang (State Key Laboratory of Coal Clean Combustion, Tsinghua University)
Park, Jong-Wook (School of Mechanical and Automotive Engineering, Sunchon National University)
Publication Information
Journal of Mechanical Science and Technology / v.17, no.1, 2003 , pp. 129-138 More about this Journal
Abstract
A 1 : 20 laboratory scale test rig of a 200 MW tangentially fired boiler is built up with completely simulated structures such as platen heaters and burners. Iso-thermal turbulent flow in the boiler is mapped by 3-D PDA (Particle Dynamic Analyzer). The 3-D numerical models for the same case are proposed based on the solution of к-$\varepsilon$ model closed RANS (Reynolds time-Averaged Navier-Stokes) equations, which are written in the framework of general coordinates and discretized in the corresponding body-fitted meshes. Not only are the grid lines arranged to fit the inner/outer boundaries. but also to align with the streamlines to the best possibility in order to reduce the NDE (numerical diffusion errors). Extensive comparisons of profiles of mean velocities are carried out between experiment and calculation. Predicted velocities in burner region were quantitatively similar with measured ones, while those in other area have same tendency with experimental counterpart.
Keywords
Tangentially Fired Boiler; Turbulent Flow; PDA (Particle Dynamic Analyzer); General Coordinates; NDE (Numerical Diffusion Error);
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Times Cited By KSCI : 2  (Citation Analysis)
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