水流作用下河底油气管道悬空处仿生草防护影响因素分析

Analysis of Influence Factors of Bionic Grass in River-bottom Oil-gas Pipeline Under Action of Steady Flow

为探讨仿生草的高度和铺设密度对水流流速的影响,采用PIV测试技术测量水流作用下仿生草段后的流场,分析不同流速条件下仿生草的倒伏情况及不同排列密度和不同高度仿生草对仿生草段后水流流速的影响。结果表明,随着来流流速的增加,仿生草的倒伏高度降低,在高流速下,仿生草也能有效保护床层,且仿生草的高度和排列密度对仿生草段后水流流速影响较大,适当提高仿生草的高度和排列密度可获得理想的防护效果。研究成果可为工程实践提供参考。

In order to discuss the impact of the height and laying density of bionic grass on flow velocity,the PIV test technology was used to measure the flow field behind the bionic grass section under the action of water flow.The lodging situation of bionic grass under different flow velocity conditions and the impact of different arrangement density and different height of bionic grass on the flow velocity behind the bionic grass section were analyzed.The experimental results show that the lodging height of the bionic grass decreased with the increase of the flow velocity.The bionic grass could effectively protect the bed under the high flow velocity,and the height and density of the bionic grass had a great impact on the flow velocity behind the bionic grass section.The ideal protection effect could be obtained by appropriately increasing the height and density of the bionic grass.The research results can provide reference for engineering practice.