Abstract
In the process of natural gas transportation, it is unavoidable for particles to collide with the wall, which will cause erosion of curved pipeline. Reasonable curved pipeline structure can effectively avoid the erosion failure. In this paper, an innovative shaped curved pipeline formed by extrusion of cylindrical indenter is presented. The erosion mechanism and sensitivity parameter analysis of the innovative shaped curved pipeline is studied by numerical simulation and compared with that of ordinary elbow. In addition, the effects of extrusion parameters and particle parameters on erosion of innovative shaped curved pipeline were also studied. The results show that the dent can effectively reduce the maximum erosion rate of elbow. With the increase of dent depth, the maximum erosion rate of elbow is decreasing. With the increase of indenter diameter, the ability to reduce the maximum erosion rate decreases. Under the harsh conditions of large particle diameter and high particle velocity, the dent has a better ability to reduce the maximum erosion wear rate, and the maximum erosion rate can be reduced by 26.8%.
Highlights
In the process of natural gas transportation, there are some small solid particles, which will cause erosion pipelines
He believed that micro-cutting was the cause of erosion of plastic materials, and proposed that strengthening metal surface strength could reduce erosion wear rate
Chen et al [6] proposed a two-phase flow erosion prediction model based on computational fluid dynamics (CFD) discrete element method (DEM) for elbow connections
Summary
In the process of natural gas transportation, there are some small solid particles, which will cause erosion pipelines. The factors affecting the severity of erosion include fluid velocity, particle rate, fluid properties, particle diameter, pipe material, and geometric characteristic size and shape. Chen et al [6] proposed a two-phase flow erosion prediction model based on CFD discrete element method (DEM) for elbow connections. J. [11] propose a novel pipe wall design in order to reduce the erosion on a 90° elbow. The simulations show that a reduction of erosion peak up to 33% can be achieved in a pipeline equipped with the twisted pipe wall. The erosion characteristics of the innovative shaped curved pipeline is studied. Sensitivity analysis is carried out for different mass flow rate, particle diameter and flow velocity of the innovative shaped curved pipeline
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