摘要
通过5种不同坡度4级不同流量共440组水流自流动试验,发现在高坡度大流量外界条件胁迫下,水流为维持畅顺泄流和稳定形态,将在散乱漫流后自主选择稳定清晰的蜿蜒弯曲形态及水流流路,说明水流有着选择蜿蜒弯曲平面形态的天然倾向性.同时,试验结果表明,蜿蜒弯曲平面形态也是水流流动的极限稳定形态,当外界扰动超出该平面形态可承载极限时,原已建立的稳定形态和结构将发生溃散.另外,对水流自流动过程中的水流弯曲度、弯曲半径、曲率、水流展宽、流路变幅等的演变变化规律进行了统计分析和研究,对水流流路与正弦曲线的相似性进行了对比分析,并就水流自流动蜿蜒弯曲形态的相关特征参数与天然河流进行了比照和对比研究.
Through a total of 440 sets of water flow self-flow experiments with 5 different slopes and 4 different discharges, it is found that under high-slope and high-flow external conditions, in order to maintain smooth drain and stable shape, the water flow will automatically select stable and clear curved water flow shape after the diffuse flow. The curved shape of the concrete and the flow path of the water indicate that the water flow has a natural tendency to select the curved plane shape. Meanwhile, the experimental results show that the curved plane shape is also the ultimate stable form of water flow. When the external disturbance exceeds the loadable limit of the plane shape, the established stable shape and structure will collapse. In addition, the statistical analysis and research on the evolution of the meandering degree, radius of curvature, curvature rate, water flow broadening, water flow path variation, etc. of the water flow are executed, and the similarity between the water flow path and the sinusoid shape is compared. The analysis and comparison of the relevant parameters of the water flow from the curved shape of the flow are compared with the natural rivers.
作者
赖永辉
唐妍
林芳莉
LAI Yonghui;TANG Yan;LIN Fangli(Guangdong Polytechnic of Water Resources and Electric Engineer. Guangzhou 510635, China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2019年第8期679-686,共8页
Engineering Journal of Wuhan University
基金
广东省水利科技创新项目(编号:201803)
广东水利电力职业技术学院创新强校重点科研项目(编号:cy060402z02)
关键词
水流
坡度
流量
平面形态
试验
water flow
slope
discharge
plane shape
experiment
