PSI - Issue 13

M. Amara et al. / Procedia Structural Integrity 13 (2018) 2137–2142 Author name / Structural Integrity Procedia 00 (2018) 000–000

2142

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Fig.9. Shear stresses on elbow for angle 15°(a) 30°(b)45° (c) and 90°(d).

4. Conclusion The erosion-corrosion rate can produce important damage to the internal surface of the pipe elbow. While the implementation conditions contribute to this deterioration; more necessary information about the influence of the flow conditions (on the opening angle of the valve and the most dominant particle size make a little more about the comprehension on the erosion-corrosion phenomenon of elbows carbon steel. Four behaviors of erosion rate occur on the pipe elbow when the water flows through the opening of the valve which has conditioned by precise angles (15°, 30°, 45° and 90°) and injected by different sizes of particles. It can be concluded by the CFD erosion rate calculation model in piping systems that: (i) Erosion rate decreases when the size of particles decrease, (ii) Medium-sized particles contribute to a decrease in the erosion rate approximately 2 times than the larger particle and 10-fimes to smaller-sized particle and (iii) The thickness of the boundary layer is important for the angle of 45°, 30° and the minimum for the angles [30° - 45°]. The stresses tend to increase with the decrease of the opening angle of the valve. we need a compromise deduced by these points drawn before where we estimate if the presence of fine particles is the most likely case that circles in the desalination pipe circuit, the opening of the valve will be open in angles of �30 ° , 45 ° � References [2] L. Zeng, G.A. Zhang ⇑ , X.P. Guo, 2104. Erosion–corrosion at different locations of X65 carbon steel elbow. Corrosion Science 85, 318–330 [3] M. Pluviose La Houille Blanche Number 2-3, Mars 1979 "Investigation of flow in pipe bends. Design of a special water separator" [4] B. Poulson, Corrosion science,Vol.35 Nos 1-4,pp.655-665,1993"advances in understanding hydrodynamic effects on corrosion" [5] John M. PIETRALIK, E-Journal of Advanced Maintenance Vol.4 No.2 (2012) 63-78 "The Role of Flow in Flow-Accelerated Corrosion under Nuclear Power Plant Conditions" [6] M. Shehadeh,Mohammed Anany andIbrahim Hassan, Investigating the effect of slurry seawater flow in carbon-teel elbows. Journal of Mechanical Engineering and Sciences (JMES), ISSN (Print): 2289-4659; e-ISSN: 2231-8380; Volume 5,pp. 592-601, December2013. [7] D. Ramajoa, M. Raviculéb, R. Beninib, S. Marquez Damiana, M. Stortia and N. Nigroa Mecánica Computacional Vol XXVIII, págs. 1621 1639 (artículo completo) 2009 " diagnose and prediction of erosion-corrosion. damage in a pipeline transporting reduced crude oil from the heater to the vacuum distillation tower". [8]Chen, X. H.; McLaury, B. S.; Shirazi, S. A. Application and experimental validation of a computational fluid dynamics. (CFD)-based erosion prediction model in elbows and plugged tees // Computers & Fluids. 33, (2004), pp. 1251–1272 [9] Ruben Cuamatzi-Mele´ndez, MA Hernandez Rojo,AO Va´zquez-Herna´ndez and Francisco L Silva-Gonza´lez , J Engineering Tribology0(0) 1–21,2017 "Predicting erosion in wet gas pipelines/ elbows by mathematical formulations and computational fluid dynamics modelling". [10] Halima Hadžiahmetović, Nedim Hodžić, Damir Kahrimanović, Ejub Džaferović Technical, Gazette 21, 2(2014), 275-282, computational fluid dynamics (cfd) based erosion prediction model in elbows [11] Finnie, I. Erosion of surfaces by solid particles // Wear. 3,(1960), pp. 87–103 [12] Y. P. Asmara1, M. F. Ismail, L. Giok Chui, Halimi, Jamiludin Materials Science and Engineering 114 (2016) 012128 "Predicting Effects of Corrosion Erosion of High Strength Steel Pipelines Elbow on CO2-Acetic Acid (HAc) Solution" [1] S . Abulnoun Ajeel , Mohammed Abdullateef Ahmed, The Iraqi Journal For Mechanical And Material Engineering, Vol.10, No.1, 2010," Damaging of Steel-Oil Pipes by Erosion and Erosion -Corrosion Phenomena"