Fluid-solid coupling analysis based erosion destruction invalidation quantitative forecast method

Abstract

The invention discloses an abrasion destroy failure quantitative prediction method, based on flow-solid couple analysis, comprising abrasion product protective film character analysis and failure prediction analysis under flow function. Based on the real condition of tube, via flow mechanics similar theory, the invention finds the standard, test condition and flow medium of object tube, via electrochemical test method, processes instant character test of abrasion destroy, builds flow-solid couple model to set characteristic parameter values of abrasion product protective film, uses finite element analysis software to process flow-solid couple simulation, combined with test, corrects the characteristic parameter values of the abrasion product protective film, based on real tube system typical tube, processes flow-solid couple simulation, to realize abrasion destroy failure quantitative prediction of tube system, which can accurately predict the failure points of whole tube system, to support the safe protection technique of pressure tube system.

Description

technical field [0001] The invention relates to a method for predicting erosion damage failure of a pipeline system, in particular to a quantitative prediction method for erosion damage failure based on fluid-solid coupling analysis. Background technique [0002] Fluid pipeline is a special equipment for transporting fluid under a certain pressure. It has become one of the five transportation modes alongside road, railway, water transportation and aviation. The transportation of various fluid materials involves various aspects such as energy supply, enterprise production, urban development and people's life. The reliability of its operation is directly related to economic development and public safety, and plays a pivotal role in the national economy. While pipelines provide people with convenient transportation, there are also great potential safety hazards, which are mainly reflected in the erosion and damage of multiphase flow corrosive media to in-service pipeline system...

AI Technical Summary

Problems solved by technology

The determination of the detection position and detection cycle is a big problem. In actual projects, the detection specifications are often formulated based on their own experience, lacking theoretical basis, and it is urgent for researchers to study the erosion law of the pipeline system and quantitatively predict its corrosion rate;

[0006] (2) The current failure prediction of erosion damage is only limited to the analysis of corrosive media and the study of the influence of parameters (such as flow velocity), and has not been based on the systematic research on the coupling effect of corrosion and fluid dynamics, let alone failure prediction. Taking the corrosion product protective film as the object to predict the coupling effect between the medium flow and the pipe wall, it is impossible to accurately predict the failure location and rate of the fluid pipeline

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