湍流作用下颗粒旋转对海水管道的冲蚀磨损过程分析

为了进一步准确预测海水管道携沙的冲蚀磨损，分析了湍流作用下颗粒旋转的冲蚀磨损过程。基于计算流体力学与冲蚀磨损理论，建立了颗粒旋转的数学模型。首先验证了双向耦合对流场的影响，计算了不同冲蚀磨损模型在考虑颗粒旋转条件下的磨损率，讨论了斯托克斯数对磨损位置的影响，分析在考虑颗粒旋转时下不同流速下冲蚀磨损过程。结果表明:考虑颗粒旋转条件下，颗粒在弯头处的运动轨迹发生明显改变，一部分颗粒在惯性力的驱动下直接冲击弯头，另一部分颗粒与弯头产生碰撞后在旋转升力的作用下环绕管壁运动，使得颗粒与壁面碰撞次数增多，颗粒获得充分发展，管道最大磨损率上升。

Erosion process analysis of particle rotation to seawater pipeline under turbulence

In order to predict the erosion of sand carrying pipeline accurately, the erosion process caused by the rotation of particles in turbulent flow were analyzed. Based on computational fluid dynamics and erosion theory, a mathematical model of particle rotation was established. The influence of stokes number on the erosion location was discussed, and the erosion process under different flow velocities considering particle rotation were analyzed. The results showed that some particles impacted the elbow directly under the driving of inertia force, and others moved around the tube wall under the action of rotating lift after collision. The number of collisions between particles and wall increases and particles flowed sufficiently. The particles were fully developed, and the maximum erosion wear rate of pipes increased.