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高温高压环境下含CO_2气液混输碳钢管道失效是腐蚀和冲刷共同作用的结果,采用数值模拟和壁厚检测相结合的方法,定量分析了高温高压CO_2气田中腐蚀-冲蚀对碳钢管线的影响。结果表明,管道壁厚减薄率随壁面剪切应力的增大按一定的函数形式增大,紊流严重程度影响失效形式。无紊流时,壁面剪切应力约为15.85~19.14 Pa时,对腐蚀产物膜产生破坏;存在紊流时,气液两相流流动产生的壁面剪切应力低至1.88 Pa左右时,对腐蚀仍有明显的促进作用。
Under the conditions of high temperature and high pressure, the failure of CO 2 -containing carbon steel pipe with CO_2 is the result of corrosion and scouring. By means of the combination of numerical simulation and wall thickness measurement, the corrosion and erosion of carbon steel pipe Effect of lines. The results show that the thinning rate of pipe wall increases with the increase of wall shear stress in a certain function, and the severity of turbulence affects the failure mode. In the absence of turbulent flow, the wall shear stress is about 15.85 ~ 19.14 Pa, which damages the corrosion product film. When there is turbulence, the wall shear stress produced by the flow of gas-liquid two-phase flow is as low as 1.88 Pa. There is still a significant role in promoting.