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Erosion Rate Correlations Of A Pipe Protruded In An Abrupt

Pipe

Contraction

Habib, MA; Badr, HM; Ben-Mansour, R; Kabir, ME

PERGAMON-ELSEVIER SCIENCE LTD, INTERNATIONAL JOURNAL OF IMPACT

ENGINEERING; pp: 1350-1369; Vol: 34

King Fahd University of Petroleum & Minerals

http://www.kfupm.edu.sa

Summary

Erosion is one of the most serious problems in various gas and liquid flow passages

such as flow in pipes, pumps, turbines, compressors and many other devices. Sand

presence causes loss of pipe wall thickness that can lead to pipe erosion, frequent

failures and loss of expensive production time. The importance of this problem is

mainly due to many related engineering applications, viz. heat exchangers. In order to

reduce the frequency of such pipe erosions, caps in the form of replaceable pipes are

protruded in the sudden contraction regions which are exposed to most of the serious

erosion rates. In the present work, numerical investigation of the erosion of a pipe

protruded in a sudden contraction is presented. The turbulent, steady, 2-D axi-

symmetric flow inside an axi-symmetric abrupt contraction pipe with a pipe

protrusion embedded in it was solved by steady-state time averaged conservation

equations of mass and momentum along with two equation model for turbulence.

Particles are tracked using Lagrangian particle tracking. An erosion model was

employed to investigate the erosion phenomena for the given geometry. The influence

of the different parameters such as the inlet flow velocity (3-10 m/s), the particle

diameter (10-400 mu m), the protruded pipe geometry (thickness T = 1-5 mm and

depth H = 2-5 mm) and the pipe contraction ratio (Cr = 0.25-0.5) on the erosion of

pipe protrusion was investigated. Correlations for the influence of inlet flow velocity,

depth and thickness of the protruded pipe on the erosion rate are presented. (c) 2006

Elsevier Ltd. All rights reserved.

Copyright: King Fahd University of Petroleum & Minerals;http://www.kfupm.edu.sa

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For pre-prints please write to: mahabib@kfupm.edu.sa

Copyright: King Fahd University of Petroleum & Minerals;http://www.kfupm.edu.sa