海底管道淘空机理数值分析

Numerical Analysis on Scouring and Emptying Mechanism of Submarine Pipelines

对海底管道周围流场进行数值模拟,总结在不同管道裸露阶段的泥沙冲刷模式,探讨管线冲刷淘空的机理,并分析不同冲刷深度、流速和管径大小对冲刷淘空的影响。研究发现随着冲刷深度的增大,冲刷速度变慢,而管径和流速越大,冲刷强度越大。

The flow field around a submarine pipeline is numerically simulated.The sediment scouring model is summarized at different pipeline exposure stages.The scouring and emptying mechanism is discussed and the influence of the parameters such as scouring height,flow velocity and pipe diameter on the scouring and emptying process is analyzed.The research indicates that the scouring speed becomes slower with the increase of scouring depth,and the scouring intensity increases with the increase of pipe diameter and flow velocity.