长江科学院院报2025，Vol.42Issue(4)：19-26,44,9.DOI:10.11988/ckyyb.20240532
基于CFD-DPM模型的不同生态抛枕防护效果分析
Protective Effects of Different Shapes of Ecological Rip-rap Bags Based on CFD-DPM Model
摘要
Abstract
Curved slopes in natural river channels are highly susceptible to erosion,posing a significant challenge for river management.To address this issue,a comparative study was conducted on the protective effects of sand-and-gravel rip-rap bags of different shapes against erosion based on the concept of ecological slope protection.First,a geometric model of the curved-channel bed was constructed according to the actual river structure.Then,the CFD-DPM method was employed to analyze the bank-protection effects of rectangular,hemispherical,and semi-cy-lindrical bags placed on the concave bank of the curved channel.Results revealed that under a flow velocity of 0.5 m/s,among the three shapes of protection bags,rectangular bags bring about the least pressure on the concave bank,while semi-cylindrical bags obstruct the largest amount of sediment particles,leading to the smallest Reyn-olds number of particles and the minimum average particle velocity,9％lower than that in the model without pro-tection bags.In conclusion,rectangular rip-raping bags offers better protection for the adjacent concave bank,while semi-cylindrical bags provide the most effective sand-blocking function.关键词
弯曲边坡防护/生态护坡/砂石抛枕/弯道河床几何模型/CFD-DPM方法/防护效果Key words
river bend slope protection/ecological protection/sand and gravel rip-rap bag/geometric modeling of curved riverbed/CFD-DPM method/protection effect分类
建筑与水利引用本文复制引用
孙洪广,洪良贞,王茂枚,王连..基于CFD-DPM模型的不同生态抛枕防护效果分析[J].长江科学院院报,2025,42(4):19-26,44,9.基金项目
江苏省水利科技项目(523074712) （523074712）
