港口航道与近海工程2024，Vol.61Issue(6)：7-12,33,7.DOI:10.16403/j.cnki.ggjs20240602
基于CFD-PBM模型疏浚管道加气减阻数值分析
Numerical Analysis of Aerated Drag Reduction in Dredging Pipelines Based on CFD-PBM Model
周智佳 1邬德宇 2周禹 1赵建豪3
作者信息
- 1. 中国海洋大学工程学院,山东青岛 266100
- 2. 中交天津航道局有限公司,天津 300461
- 3. 中交(天津)生态环保设计研究院有限公司,天津 300202
- 折叠
摘要
Abstract
The energy loss caused by the delivery of mud in the process of dredging pipelines has significant impact on the spacing of pipelines.Eulerian model of particle dynamic theory and PBM model was used to carry out the numerical simulation analysis of three-phase flow delivery of the dredged pipelines.After the grid and model were verified independent and effective respectively,the analysis was made for the changes in slurry flow characteristics and pipeline pressure loss gradient caused by pipeline aerated delivery.The results showed that the pipeline aerated delivery could reduce the sedimentation of solid particles,narrow the low concentration area at the top of the pipeline,which was much more obvious with the increase of aerated volume based on lower air concentration,but the above effect tended to be stable subject to a certain air volume being reached.An aerated pipeline ensured more regular flow of the slurry inside the pipeline,enlarged high-speed-flow area,and the decreased flow velocity at the centre of the pipeline.The aerated pipeline also led to better drag reduction effect.The pressure loss gradient of the pipeline decreases with the increase of aerated volume,and then gradually became stable,especially for the delivery of medium coarse sand.The suitable aerated volume should range from 3%to 4%.The research results could serve as a reference for the design of pipeline delivery and the related engineering application.关键词
疏浚管道/加气输送/PBM模型/减阻Key words
pipeline dredging/aerated delivery/PBM model/drag reduction分类
水利科学引用本文复制引用
周智佳,邬德宇,周禹,赵建豪..基于CFD-PBM模型疏浚管道加气减阻数值分析[J].港口航道与近海工程,2024,61(6):7-12,33,7.
