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Experimental validation of numerical model for turbulent flow in a tangentially fired boiler with platen reheaters

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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 ofk-ε 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.

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Abbreviations

\(\tilde B^{ii} \) :

Discretized metric components

g1 :

Contravariant base vector

Ij :

Base vector of Cartisian coordinates

i :

Unit vector

J :

Jacobian of the transformation

k :

Turbulent kinetic energy

N :

Total number of particles

p :

Pressure

p k :

Control function

r:

Position vector

▵t:

Time step

Ū:

Mean velocity of particles

U :

Velocity of a particle

Uj :

Velocity component in the fixed Cartesian coordinates

V i :

Contravariant velocity component in the cur-vilinear coordinates

X i :

Cartesian coordinates

ε:

Turbulence dissipation rate

μ:

Coefficient of viscosity

p :

Density of glass beans

#x03BE;i :

General coordinates

▵ξ:

Distance between the nodes

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Authors and Affiliations

  1. State Key Laboratory of Coal Clean Combustion, Tsinghua University, 100084, Beijing, China

    Chang Hao Zheng & Xu Chang Xu

  2. School of Mechanical and Automotive Engineering, Sunchon National University, 540-742, Suncheon,Chonnam, Korea

    Jong Wook Choi

Authors
  1. Chang Hao Zheng
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  2. Xu Chang Xu
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  3. Jong Wook Choi
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Correspondence to Jong Wook Choi.

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Zheng, C.H., Xu, X.C. & Choi, J.W. Experimental validation of numerical model for turbulent flow in a tangentially fired boiler with platen reheaters. KSME International Journal 17, 129–138 (2003). https://doi.org/10.1007/BF02984294

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  • DOI: https://doi.org/10.1007/BF02984294

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