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Numerical Study of the Solid Particle Erosion on H-Type Finned Circular/Elliptic Tube Surface

Part of: Thermodynamics and heat transfer

Published online by Cambridge University Press:  07 February 2017

Yu Jin ,
Gui-Hua Tang ,
Ya-Ling He  and
Wen-Quan Tao
Yu Jin
Affiliation:
Key Laboratory of Thermo-Fluid Science & Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
Gui-Hua Tang
Affiliation:
Key Laboratory of Thermo-Fluid Science & Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
Ya-Ling He
Affiliation:
Key Laboratory of Thermo-Fluid Science & Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
Wen-Quan Tao*
Affiliation:
Key Laboratory of Thermo-Fluid Science & Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
*
*Corresponding author.Email addresses:wqtao@mail.xjtu.edu.cn (W.-Q. Tao)
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Abstract

In this paper, numerical simulations of solid particle erosion phenomena on H-type finned circular/elliptic tube surface, which is of great significance to the antiwear design of heat exchanger, are presented. The Eulerian-Lagrangian approach is applied to simulate the dilute gas-solid flow through H-type finned circular/elliptic tubes. A semi-empirical model is adopted to predict the erosion rate. The dynamics behavior of the entrained solid particles in the flow is presented. The geometry of eroded tube surface is changed with the predicted erosion which is taken into account by a UDF and the flow field is re-solved for the eroded tube surface at every time step. The influences of ten parameters (the tube bundle arrangement, particle size, particle concentration, fluid Reynolds number, fin thickness, fin pitch, fin length, fin width, slit width and the transverse tube pitch) on the maximum erosion depth of the H-type circular/elliptic finned tube surface are investigated. Using H-type finned elliptic tube surface can effectively reduce the erosion rate of tube surface comparedwith that using H-type finned circular tube surface. The erosion in in-line arrangement is less severe than that in staggered arrangement. With the increase of particle size, particle concentration and the fluid Reynolds number, the erosion rate of the tube surface rises. The numerically predicted effect of Reynolds number is in good agreement with previous test data. Among the six geometry parameters, the most influential parameter is the transverse tube pitch.

Keywords

Waste heat recoveryH-type finned circular/elliptic tubesolid particle erosionnumerical simulation

MSC classification

Secondary: 80A20: Heat and mass transfer, heat flow
Type
Research Article
Information
Communications in Computational Physics , Volume 21 , Issue 2 , February 2017 , pp. 466 - 489
Copyright
Copyright © Global-Science Press 2017 

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