采用物理模型试验的方法,在综合考虑燕尾挑坎、窄缝挑坎2种消能工各自特点的基础上,针对长河坝水电站2#泄洪洞挑流水舌所必须达到的挑射效果,进行了窄缝燕尾新型组合挑坎的试验研究。从挑坎内部水流流态、出挑水舌形态以及下游消能防冲效果3个方面进行了燕尾挑坎、窄缝挑坎以及新型组合挑坎之间的对比试验。研究结果表明新型的组合体型兼有燕尾挑坎与窄缝挑坎的优点,它在改善坎内水流流态、水舌形态、减轻下游河道冲刷方面起到了重要作用,同时也满足2#泄洪洞出挑水舌的限制要求。试验的研究成果可供类似工程参考。
Abstract
To meet the requirement of trajectory nappe in the flood release tunnel 2# in Changheba hydropower station, we designed a new-type bucket combing narrow slit and swallow-tail by physical model. The characteristics of slit-type bucket and swallow-tail bucket were comprehensively considered. The flow pattern in bucket, water jet, and energy dissipation and erosion control in the downstream of these three bucket types were compared. Results suggest that this new-type bucket has the advantages of both swallow-tail bucket and slit-type bucket. It improves the flow pattern in bucket, and optimizes water jets form and alleviates downstream scouring. Besides, it adapts to the requirement of trajectory nappe in the flood release tunnel 2#. The research result could be a reference for similar projects.
关键词
泄洪洞 /
燕尾挑坎 /
窄缝挑坎 /
组合挑坎 /
消能
Key words
flood release tunnel /
swallow-tail bucket /
slit-type bucket /
combined bucket /
energy dissipation
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 刘士和.高速水流.北京:科学出版社,2005. (LIU Shi-he. High Velocity Flow. Beijing: Science Press, 2005. (in Chinese))
张建民,许唯临.高水头大流量泄洪洞挑坎体型优化及下游冲於研究.四川大学学报(工程科学版),2007,39(4):20-25. (ZHANG Jian-min, XU Wei-lin. Scour Downstream River and Optimum Geometry of Flip Bucket in Tunnel with High Head and Large Discharge. Journal of Sichuan University (Engineering Science), 2007, 39(4):20-25. (in Chinese))
倪汉根.高效消能工.大连:大连理工大学出版社,2000. (NI Han-gen. Effective Energy Dissipators. Dalian: Dalian University of Technology Press, 2000. (in Chinese))
倪汉根,刘亚坤.击波 水跃 跌水 消能. 大连:大连理工大学出版社,2008:37-42.(NI Han-gen, LIU Ya-kun. Shock Wave Hydraulic Jump Plunge Energy Dissipation. Dalian: Dalian University of Technology Press, 2008:37-42.(in Chinese))
游 湘,曾 勇.锦屏一级水电站泄洪消能布置设计∥第二届全国水工泄水建筑物安全及抗冲磨新材料开发新技术应用论文集.深圳:中国水利技术信息中心,2010:115-119.(YOU Xiang, ZENG Yong. Energy Dissipation Layout of Jingping Hydropower Stations∥Proceedings of Release Structure Building Safety and New Anti-shock Material Technology. Shenzhen: China Information Center for Hydro-technology, 2010:115-119. (in Chinese))
南京水利科学研究院,水利水电科学研究院.水工模型试验.北京:中国水利水电出版社,1985. (Nanjing Hydraulic Research Institute and Institute of Water Resources and Hydropower Research. Hydraulic Model Test. Beijing: China Water Power Press,1985. (in Chinese))
赵 昕,张晓元,赵明登,等.水力学.北京:中国电力出版社,2009. (ZHAO Xin,ZHANG Xiao-yuan, ZHAO Ming-deng, et al. Hydraulics. Beijing: China Electric Power Press, 2009. (in Chinese))
PDF(2549 KB)
