| 含柔性植物明渠水流阻力特性试验研究 |
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| 引用本文： | 渠庚,张小峰,陈栋,陈静婷,丁兵.含柔性植物明渠水流阻力特性试验研究[J].水利学报,2015,46(11):1344-1351. |
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| 作者姓名： | 渠庚 张小峰 陈栋 陈静婷 丁兵 |
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| 作者单位： | 长江科学院水利部江湖治理与防洪重点实验室, 湖北武汉 430010;武汉大学水资源与水电工程科学国家重点实验室, 湖北武汉 430072,武汉大学水资源与水电工程科学国家重点实验室, 湖北武汉 430072,长江科学院水利部江湖治理与防洪重点实验室, 湖北武汉 430010,长江科学院水利部江湖治理与防洪重点实验室, 湖北武汉 430010,长江科学院水利部江湖治理与防洪重点实验室, 湖北武汉 430010 |
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| 基金项目： | 国家自然科学基金重点项目(51339001);国家自然科学基金青年基金项目(51309022);水利部公益性行业科研专项(201401011) |
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| 摘 要： | 利用水槽试验研究了无草、淹没型、非淹没型柔性植物水流阻力特性的变化规律,分析了含植物明渠沿程水面比降和阻力系数的变化特性。得到各植物阻力系数变化与尼库拉兹曲线基本相似,紊流范围内同样可划分为紊流光滑区、紊流过渡区、紊流粗糙区;探讨了各植物明渠等效河床的问题,据此确定了各植物的粗糙度,对植物粗糙度、水流雷诺数和阻力系数之间的关系进行了分析,并通过对各植物水流阻力系数的分区回归计算,得到各植物水流阻力的分区经验表达式,该方法能较好地应用于含植物明渠水流阻力系数的推求。
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| 关 键 词： | 柔性植物 等效河床 植物粗糙度 水流阻力 |
| 收稿时间： | 2015/1/15 0:00:00 |
Experimental study on flow resistance characteristics in open channel with flexible vegetation |
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| QU Geng,ZHANG Xiaofeng,CHEN Dong,CHEN Jingting and DING Bing.Experimental study on flow resistance characteristics in open channel with flexible vegetation[J].Journal of Hydraulic Engineering,2015,46(11):1344-1351. |
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| Authors: | QU Geng ZHANG Xiaofeng CHEN Dong CHEN Jingting and DING Bing |
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| Affiliation: | Laboratory of River Regulation and Flood Control of MWR, Changjiang River Scientific Research Institute, Wuhan 430010, China;State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China,State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China,Laboratory of River Regulation and Flood Control of MWR, Changjiang River Scientific Research Institute, Wuhan 430010, China,Laboratory of River Regulation and Flood Control of MWR, Changjiang River Scientific Research Institute, Wuhan 430010, China and Laboratory of River Regulation and Flood Control of MWR, Changjiang River Scientific Research Institute, Wuhan 430010, China |
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| Abstract: | Flume experiments were carried out for studying the variation rule of flow resistance characteristics, in open channel with submerged and unsubmerged flexible vegetation, and the variations of on-way water surface slope and drag coefficient of open channel with the three plants are analyzed. It is found that the variation of drag coefficient of each plant is similar with Nikuradse curve in general. Turbulent flow range can be divided into turbulent smooth zone,turbulent transition rough zone,and turbulent drag rough zone. The problem of vegetafion equivalent bed is counted and the relationship between flow resistance coefficient and roughness for each plant is obtained accordingly. Regression analysis on the relationship verified that the method can be applied to deduce the resistance coefficient of open channel flow with plants. |
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| Keywords: | Flexible vegetation equivalent bed vegetation roughness flow resistance |
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