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在输气管线中,不可避免会含有一些固体杂质颗粒,且输气管道中气体流速快,高速的气体携带固体颗粒对管壁不断冲击,更易造成管道的冲蚀。特别是在节流阀处,由于阀口流通截面积减小,速度、压力和固体颗粒的流动轨迹发生改变,常产生较严重的冲蚀现象。通过FLUENT软件,从流体力学的角度进行数值模拟分析,采用有限体积法建立数学模型,对输气管线中节流阀的冲蚀现象进行了数值模拟研究,验证了节流阀中较易发生冲蚀的部位。对节流阀在不同条件下的平均冲蚀速率进行分析得出:节流阀的平均冲蚀速率随流体进口速度、压力、颗粒直径、颗粒含量的增加而增大。
In the gas pipeline, inevitably contains some solid impurities particles, and gas pipeline gas flow rate fast, high-speed gas carrying solid particles on the wall constantly impact, more likely to cause pipeline erosion. Especially at the throttle valve, due to the valve cross-sectional flow area decreases, the velocity, pressure and solid particles flow trajectory changes, often have more serious erosion. Through FLUENT software, the numerical simulation analysis is made from the perspective of fluid mechanics. The finite volume method is used to establish the mathematical model to simulate the erosion phenomenon of throttling valve in gas pipeline. Erosion of the site. The average erosion rate of throttle valve under different conditions was analyzed. The results showed that the average erosion rate of throttle valve increased with the increase of fluid inlet velocity, pressure, particle diameter and particle content.