植被茎秆变形对水流结构的影响分析

刘 明; 张升堂; 张景洲; 赵庆星; 孙桤汶; 王磊

引用本文:	刘明,张升堂,张景洲,等.植被茎秆变形对水流结构的影响分析[J].灌溉排水学报,0,():-.
	liu ming,zhang shengtang,zhang jingzhou,et al.植被茎秆变形对水流结构的影响分析[J].灌溉排水学报,0,():-.

【打印本页】【下载PDF全文】【查看/发表评论】【EndNote】【RefMan】【BibTex】

过刊浏览高级检索

本文已被：浏览 1338次下载 0次
分享到：微信更多字体:加大+\|默认\|缩小-
植被茎秆变形对水流结构的影响分析
刘明¹, 张升堂¹, 张景洲¹, 赵庆星², 孙桤汶², 王磊²
1.山东科技大学地球科学与工程学院;2.山东科技大学

摘要:

为分析植被茎秆变形对水流结构流态的影响，通过建立明渠植被水流结构模型将水流液层在空间高度上分为植被层和自由层。在茎秆不同的变形状态下及流量范围内开展试验，试验结果表明：在相同倾伏角θ条件下，植被层Vv随水深h增加而增加、减少、再增加后趋于稳定的过程，自由层平均速度Vs、雷诺数Res、弗劳德数Frs随水深h的增大迅速减小后趋于稳定，总体来说，自由层的水流流速Vs、雷诺数Res、弗劳德数Frs均大于植被层；不同倾伏角θ下，植被层水力参数Vv、Rev、Frv在空间上表现出各向异性。自由层Vs、Res、Frs随植被倒伏角θ增大而减小，植被淹没临界水深值h 呈现滞后现象。这一研究成果为减少水土流失、汛期防洪提供理论依据。

关键词: 倾伏角；植被层；自由层；水流结构；流态

DOI：

分类号:TV14

基金项目:国家自然科学基金(41471025)；山东科技大学研究生科技创新项目(SDKDYC180320)

Analysis on the influence of stem deformation on water flow structure

liu ming¹, zhang shengtang¹, zhang jingzhou¹, zhao qingxing², sun qiwen², wang lei²

1.School of Earth Science and Engineering, Shandong University of Science and Technology;2.山东科技大学

Abstract:

In order to analyze the influence of stem deformation on the flow structure, the flow structure model of open channel vegetation was established to divide the water flow layer into the vegetation layer and the free layer at the space height.In the stem of the different deformation condition and flow rate range to carry out the test, the test results show that: under the condition of same pitching Angle theta, Vv vegetation layer increases with the increase of water depth h, reduce, add after stabilizing process, the average velocity Vs free layer, Reynolds number Res, froude number Frs decreases quickly with the increase of water depth h to stabilise, in general, free layer, Reynolds number Res, froude number of flow velocity Vs Frs were greater than the vegetation layer;At different inclination angles, the hydraulic parameters Vv, Rev and Frv of vegetation layer show anisotropy in space.The free layer Vs, Res and Frs decreased with the increase of vegetation lodging Angle, and the critical depth value h of vegetation submersion presented a "lag" phenomenon.This research result provides theoretical basis for reducing soil erosion and flood control in flood season.

Key words: Pitching Angle; Vegetation layer; Free layer; Flow structure; Flow regime