摘要
挑流消能是高水头泄水建筑物最常用的消能方式,而水舌特性是影响挑流消能的重要因素之一。根据模型试验和理论分析归纳总结了挑流水舌挑距的计算方法及影响挑距的因素;对比了不同挑坎体型的挑流水舌特性,得出窄缝挑坎水舌充分扩散并提高了消能率;掺气后的水舌改变了其三维扩散轨迹,从而减少了挑流水舌对河床的冲刷;针对挑流雾化问题,分析了泄水建筑物的冲刷和雾化与挑流水舌特性之间的关系。为挑流水舌研究提出进一步的建议。
Trajectory energy dissipation is the most common method of energy dissipation in high head outlet structure. Nappe characteristic is one of the important factors affecting trajectory energy dissipation. Based on experiment result and numerical simulation, computational method of the trajectory distance and the factors influencing trajectory distance are summarized. Comparison between nappes of different type buckets shows that nappe from slit type flip bucket spreads fully and increases the ratio of energy dissipation. The aerated nappe changes the three-dimensional diffusion path, and thus reduces the scour of the river. The relationship between the scour and atomization of the outlet structure and the characteristics of the trajectory nappe is analyzed. Some suggestions are put forward for the research of the trajectory nappe.
作者
宁景昊
宁利中
宁碧波
田伟利
吴昊
NING Jing-Hao;NING Li-Zhong;NING Bi-Bo;TIAN Wei-Li;WU Hao(State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi＇ an University of Technology, Xi＇ an 710048, China;College of Civil Engineering and Architecture, Jiaxing University, Jiaxing 314001, Zhejiang, China;Department of Architecture, Shanghai University, Shanghai 200444, China)
出处
《黑龙江大学工程学报》
2017年第4期1-6,共6页
Journal of Engineering of Heilongjiang University
基金
陕西省重点学科建设资金资助项目(00x901)
西北旱区生态水利工程国家重点实验室培育基地基金资助项目(2017ZZKT-2)
关键词
挑流消能
水舌特性
雾化
掺气
冲刷
trajectory energy dissipation
nappe characteristics
atomization
aeration
scour
