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| Analysis on Erosion of Pipe Bends Induced by Liquid-solid Two-phase Flow |
Wenshan PENG,Xuewen CAO( ) |
| College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, China |
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Abstract The effect of particle-parameters of a liquid-solid two phase flow on the erosion rate of different sections for pipebends was analyzed by means of computational fluid dynamics (CFD) in terms of flow rate, particle size and particle velocity etc., while the trajectories of particles were calculated by Lagrange method. Then the relevant erosion mechanism of pipe wall may be acquired by considering the known particle collision model. The results show that: (1) the vulnerable areas mainly exist on the sidewall, as well as the outermost side of the junction of downstream straight pipe and elbow; (2) the change of Stokes number can cause shift of the serious erosion area, whilst not the entire sidewall of the junction of downstream straight pipe and elbow will be subjected to serious erosion.
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