Series bending pipe is widely used in high pressure oil and gas transportation industry.The main reason of bending pipe failure is the defect caused by erosion wear of solid particles on bending pipe.In order to further study the erosion rule of series bending pipe with defects,based on the theory of erosion and gas-solid two-phase flow,this paper adopts numerical simulation method to analyze the erosion characteristics of complete series bending pipe to establish a series bending defect model,and explores the influence of defect structure parameter side length and depth on the erosion rule of series bending pipe.The research results show that the erosion phenomenon of series bending with defects is more obvious than that of complete series bending,and the maximum erosion rate of series bending with defects is located at the place where the defects occur.Meanwhile,the bending defects of inlet section will affect the maximum erosion rate of outlet section,while the bending defects of outlet section have almost no influence on the maximum erosion rate of inlet section.When the defect is located in the inlet bend,the maximum erosion rate of the inlet bend first increases and then decreases with the increase of the defect side length and depth.When the defect is located in the outlet bend,the maximum erosion rate of the outlet bend first increases and then decreases with the increase of the side length,and gradually decreases with the increase of the depth.The research results can provide a theoretical reference for the development law of series bend defects and the subsequent optimization of series bend structure.
series elbowgas-solid two-phase flowerosion characteristicserosion law
维普
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