1. © 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

2. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. © References: AHLERT KR, 1994, THESIS U TULSA ASTARITA G, 1968, IND ENG CHEM FUND, V7, P27 BADR HM, 2002, 6 SAUD ENG C DHAHR K, V5 BADR HM, 2005, COMPUT FLUIDS, V34, P721, DOI 10.1016/j.compfluid.2004.05.010 BENEDICT RP, 1966, T ASME A, V88, P73 BLATT W, 1989, CORROSION, V45, P793 BULLEN PR, 1986, DETERMINATION PIPE C, P111 BULLEN PR, 1996, P I MECH ENG, V210, P171 CLARK HMI, 1992, INT J IMPACT ENG, V12, P15 DURST F, 1984, APPL MATH MODEL, V8, P101 EDWARDS JK, 1998, ASME FLUIDS ENG DIV FOSSA M, 1998, INT J HEAT MASS TRAN, V41, P3807 GERAMITAJABADI H, 1985, THESIS KINGSTON POLY HABIB MA, 2004, INT J NUMER METH FL, V46, P19, DOI 10.1002/fld.744 JAYANTI S, 1991, APS0099 AEA PETR SER KAYS WM, 1950, T ASME, V72, P1067 LU QQ, 1993, INT J MULTIPHAS FLOW, V19, P347 MCLAURY B, 1996, THESIS U TULSA MENG H, 1991, ASME FLUIDS ENG DIVI, V118, P183 MICHAELIDES EE, 1997, J FLUID ENG-T ASME, V119, P233 MORSI SA, 1972, J FLUID MECH, V55, P193 ODAR F, 1964, J FLUID MECHANICS 2, V18, P302 PATANKAR SV, 1980, NUMERICAL HEAT TRANS PICART A, 1986, INT J MULTIPHAS FLOW, V12, P237 POSTLETHWAITE J, 1993, CORROSION, V49, P850 SAFFMAN PG, 1965, J FLUID MECH, V22, P385 SALAMA MM, 1983, OFFSH TECHN C OTC TX SHIH TH, 1995, COMPUT FLUIDS, V24, P227 SHIRAZI SA, 1995, J PRESS VESS-T ASME, V117, P45 TU JY, 1996, ASME FED, V236, P751 WALLACE MS, 2000, P 2000 ASME FLUIDS E WALLACE MS, 2004, WEAR, V256, P927 WANG J, 2003, T ASME, V125 WILCOX DC, 2000, TURBULENCE MODELING WOOD RJK, 2004, WEAR, V256, P937 For pre-prints please write to: mahabib@kfupm.edu.sa Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa