| Cite this article: | 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,():-. |
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| Analysis on the influence of stem deformation on water flow structure |
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liu ming1, zhang shengtang1, zhang jingzhou1, zhao qingxing2, sun qiwen2, wang lei2
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1.School of Earth Science and Engineering, Shandong University of Science and Technology;2.山东科技大学
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| 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 |
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