水力发电2024，Vol.50Issue(5)：117-121,5.
U型弯道内L型丁坝群对不同水位水流水力特性影响试验研究
Experimental Study on the Influence of L-Shaped Groin Group in U-Shaped Bend on Hydraulic Characteristics of Flow at Different Levels
摘要
Abstract
Bends affect navigation,and at the same time,easy to cause soil erosion,river bed siltation and other problems.L-shaped groin group is a common hydraulic engineering structure,which can adjust the flow speed and improve the dynamic characteristics of the flow,and is used to protect the shoreline and prevent sedimentation.Most rivers in China have no fixed water level all the year round,and the influence of groin group on the flow characteristics under different water levels is worth studying,which can provide guidance for engineering practice.In this experiment,the particle image velocity measurement system and the wireless water level measuring system are used to measure and record the physical quantities such as flow velocity and water level,and the influence of groin group under different water levels on water flow is analyzed by Matlab software.The conclusions are drawn as follows:with the increase of water level,the speed of water flow gradually decreases,the downstream part of the groin group is the best position to prevent erosion and siltation,and the ratio of dam height to water depth will affect the role of groin group.When the ratio of dam height to water depth is about 2.5,the role of groin group can be well played,which should be considered in the engineering design.关键词
U型弯道/L型丁坝群/坝高水深比/粒子图像测速系统/水力特性Key words
U-shaped bend/L-shaped groin group/ratio of dam height to water depth/particle image velocity(PIV)measurement system/hydraulic characteristics分类
建筑与水利引用本文复制引用
杨亚杰,杨海鹏,景何仿,何斌,李昕,张茹凤..U型弯道内L型丁坝群对不同水位水流水力特性影响试验研究[J].水力发电,2024,50(5):117-121,5.基金项目
国家自然科学基金资助项目(11861003) （11861003）
宁夏自然科学基金项目(2023AAC02049) （2023AAC02049）
北方民族大学科学计算与工程应用创新团队(2022PT_S02) （2022PT_S02）
北方民族大学本科生创新项目(202211407011) （202211407011）
国家民委领军人才支持计划(11314000706). （11314000706）
