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Research Papers: Multiphase Flows

CFD Evaluation of Solid Particles Erosion in Curved Ducts

[+] Author and Article Information
Samy M. El-Behery

Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypts_elbehery@yahoo.com

Mofreh H. Hamed

Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, Egyptmofrehhh@yahoo.com

K. A. Ibrahim

Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egyptkamalabd56@hotmail.com

M. A. El-Kadi

Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egyptmohamedelkady@yahoo.com

J. Fluids Eng 132(7), 071303 (Jul 22, 2010) (10 pages) doi:10.1115/1.4001968 History: Received October 15, 2008; Revised June 02, 2010; Published July 22, 2010; Online July 22, 2010

This paper investigates numerically the erosion phenomenon that occurs in 90 deg and 180 deg curved ducts. The erosion prediction model comprises from three stages: flow modeling, particle tracking, and erosion calculations. The proposed three stages of the present model are tested and validated. Comparisons between predicted penetration rate and published experimental data show a good agreement. The effects of bend orientation, inlet gas velocity, bend dimensions, loading ratio, and particle size on the penetration rate are also simulated. In addition, based on many predictions of erosion rate results, new CFD based correlations are developed for the maximum penetration rate and its location. These correlations can be used to predict the bend lifetime for particular operating conditions.

Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 11

Effect of pipe diameter on the penetration rate distribution along the outer wall of 180 deg bend

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Figure 12

Effect of pipe diameter on the impact locations for a particle located at pipe center

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Figure 13

Effect of mass loading ratio on the penetration rate distribution along the outer wall of 90 deg and 180 deg bends

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Figure 14

Effect of bend orientation on the penetration rate distribution along the outer wall of 90o bend

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Figure 15

Comparisons between particle tracking predictions (P. T.), simplified maximum Pn equation (Eq. 24), and published data of Refs. 6,10,29. (a) Effect of sand flow rate (or mass loading ratio) on the maximum penetration rate. (b) Effect of inlet gas velocity on the maximum penetration rate.

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Figure 16

Comparison between calculated Pn using simplified maximum Pn equation, (Eq. 24), and published measured data

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Figure 17

Comparisons between the present particle tracking predictions (P. T.) and simplified maximum Pn equation (Eq. 24) for 90 deg bend

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Figure 19

Comparisons between the predicted locations of maximum penetration rate, θmax, using the proposed equation (Eq. 26) and available data

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Figure 1

Definition of velocities and angles before impact and after rebound

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Figure 2

Comparison between predicted penetration rate and experimental data reported in Ref. 6, (Uo=50 m/s and Mr=2.8)

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Figure 3

Comparison between predicted penetration rate and experimental data of Ref. 1, (Uo=50 m/s and Mr=2.8)

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Figure 4

Effect of curvature ratio on the penetration rate distribution along the outer wall of 90 deg bends

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Figure 5

Effect of curvature ratio on the penetration rate distribution along the outer wall of 180 deg bends

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Figure 6

Predicted impact locations in different 90 deg bends for a particle located at pipe center

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Figure 7

Effect of inlet gas velocity on the penetration rate distribution along the outer wall of 90 deg and 180 deg bends

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Figure 8

Effect of particle diameter on the penetration rate distribution along the outer wall of 90 deg and 180 deg bends

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Figure 9

Effect of particle diameter on the impact location for a particle located at pipe center

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Figure 10

Effect of pipe diameter on the penetration rate distribution along the outer wall of 90 deg bends

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Figure 18

A schematic representation of the location of bend puncture point

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