摘要
为了研究单个透水丁坝对溢洪道泄槽弯道水流流态的影响,采用PVC板制作试验模型,进行了溢洪道泄槽弯道凹岸3个位置(1/4、1/2、3/4弯道处)、3个角度(45°、60°、75°)布置单个透水丁坝的水力学试验。利用试验结果,分析了溢洪道泄槽弯道水面均匀度、弯道横断面最大水面横比降、壅水曲线等弯道水流特征。结果表明,与无透水丁坝相比,弯道内布置单个透水丁坝后的弯道水面均匀度均有增加;单个透水丁坝布置角度为60°或75°时,弯道横断面最大水面横比降减小。在布置角度相同、布置位置不同的条件下,单个透水丁坝在弯道1/4处引起的壅水曲线的长度最短;在弯道1/4处,当单个透水丁坝布置角度为60°或75°时,弯道内的壅水曲线长度最短;在弯道1/2或3/4处,当单个透水丁坝布置角度为75°时,弯道内的壅水曲线长度最短。
In order to study the impact of a single permeable spur-dike on the flow regime in the bend of spillway chute, this paper conducted hydraulic experiments of a single permeable spur-dike which was disposed in the concave bank of bend of spillway chute according to three locations （quarter, half and three quarters of the bend） and three angles （45°, 60° and 75°）. Based on the experiment results, the characteristics of flow such as water surface evenness, maximum water surface transverse slope of cross section of bend and backwater curve were analyzed. Compared with no permeable spur-dike, the results show that the water surface evenness increases when single permeable spur-dike is placed in the bend. The maximum water surface transverse slope of cross section of bend decreases when the single permeable spur- dike is disposed at the angle of 60° or 75°. Under the condition of the same angle and different location, the dike placed at a quarter of bend can cause the shortest backwater curve. While with the dike placed at quarter of bend, the backwater curve is the shortest when the single permeable spur-dike is placed at the angle of 60° or 75°. Similarly, with the dike placed at half or three quarters of bend, the water backwater curve is the shortest when the angle is 75°.
作者
杨金孟
滕晓敏
陈威
张靖
张庆华
YANG Jin-meng,TENG Xiao-min,CHEN Wei,ZHANG Jing,ZHANG Qing-hua(College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian 271018, Chin)
出处
《水电能源科学》
北大核心
2018年第9期102-106,共5页
Water Resources and Power
基金
山东农业大学青年科技创新基金项目(2017)
关键词
透水丁坝
弯道水流
水面均匀度
水面横比降
permeable spur-dike
flow in a bend
water surface evenness
water surface transverse slope
