Numerical Simulation Of Erosion On The Typical Parts Of Oil Pressure Pipeline

Offshore oil platform is major basic equipment of developing ofocean petroleum and gas. Though particle size of sand in produced oil issmall, it can cause erosion on pipe wall, especially typical parts of pipe likeelbow, tee, reducer pipe, etc. In this paper, liquid-solid two phase flow intypical parts of oil pressure pipeline is simulated by CFD. The position whichis prone to wear on several typical pipe fitting is summarized and it can be areference for pipe erosion prediction and prevention.1) On the basis of literature investigation, this dissertation presents adetailed analysis of main wear theory, and introduces main influencingfactors of erosion and erosion model. Experiment research and CFDapplication research status of piping erosion domestic and foreign isintroduced. Computational fluid dynamics and related calculation model areintroduced, and determine the suitable calculation model for study subjects.2) Multiphase flow in bending pipe is simulated by CFD. The positionprone to erosion can be found out by analyzing the distribution of internalflow field and erosion on wall. Then change conditions like the pipeplacement mode (vertical or horizontal), bending, bending diameter ratio,inlet velocity and so on to further analysis the impact of these factors on thebent pipe erosion.3) Multiphase flow in sudden expansion pipe, sudden contraction pipe, thediverging pipe and the reducing pipe are simulated by CFD to find out theposition has seriously erosion. Then change inlet velocity, sand content,structure parameters of pipe like sudden expansion ratio of sudden expansionpipe, sudden contraction ratio of sudden contraction pipe, the diverging angleof the diverging pipe, the reducing angle of the reducing pipe to find out theerosion pattern of the four pipe fitting.4) Multiphase flow in tee is simulated by CFD to find out the position ontee has seriously erosion. Then change factors like the pipe placement mode (vertical or horizontal), bending, inlet velocity, sand content to obtain theerosion pattern of the tee.