在输油管线中, 弯头常用于管道转弯处以改变管道的方向, 由于弯头处流体方向改变导致流体的速度和压力发生突变, 极易发生冲蚀作用, 甚至造成破裂、穿孔等。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, 针对不同流速的情况, 对弯头内部流场进行数值模拟, 分析压力、速度等流动参数的变化情况, 直观形象地分析了流场对弯头冲蚀造成的影响, 验证了弯头处较易腐蚀的部位, 为研究流体力学因素对管道冲蚀的影响提供了依据。

Oil pipeline elbow is often used to change the direction of oil flow. The sudden change of fluid direction and pressure at the elbow always causes erosion-corrosion, resulting in punching or breaking. A mathematical model of the fluid in the elbow was established based on the finite volume method, and the fluid dynamics at the point was analyzed using FLUENT. The change of flow velocity and pressure in the elbow was analyzed at a series of flow speeds, which can give an intuitional method to show how the flow distribution influences the erosion-corrosion at the elbow, and to verify the place corroded easily, which can provide a scientific basis for comprehension of the effect of hydrodynamic factors on pipe errosion-corrosion.