“龙抬头”泄洪洞高速水流掺气减蚀研究  

On Air Entrainment and Cavitation Alleviation in High-speed Flow of Inlet-raised Spillway Tunnel

作　　者：詹双桥 杨志明 郑洪 幸添 ZHAN Shuangqiao;YANG Zhiming;ZHENG Hong;XING Tian(Hunan Hydro & Power Design Institute,Changsha,Hunan,410007,China)

机构地区：[1]湖南省水利水电勘测设计研究总院

出　　处：《水利与建筑工程学报》2019年第3期155-159,163,共6页Journal of Water Resources and Architectural Engineering

基　　金：湖南省水利科技项目(湘水科计[2012]177-5,湘水科计[2017]230-28)

摘　　要：高流速泄洪洞易发生空蚀破坏,甚至威胁建筑物安全,采用合适的掺气减蚀措施是减免空化、冲蚀破坏有效的技术手段。通过减压模型试验、理论计算分析、工程运用调研,对涔天河水库"龙抬头"布置的2#泄洪洞高速水流掺气减蚀开展了系统研究,提出了局部体型改进措施、衬砌平整度控制标准,及掺气坎布置与体型优化,简化了衬砌施工工艺,加快了施工进度,保证了工程质量。Spillway tunnel with high-speed flow is prone to cavitation damage and eventually threaten structure safety. Appropriate air entrainment and cavitation alleviation measures is an effective techniques to reduce cavitation and erosion damage. Through pressure-reduction model test, theoretical calculation analysis and engineering application investigation, systematic analysis on air entrainment and cavitation alleviation of No.2 spillway tunnel set with inlet-raised section in Centianhe Project were carried out. With the proposed measures of improving of local shape, controls on lining flatness, optimization in aerator layout and shape, the lining construction process was simplified, the construction progress can be accelerated, and at the same time ensure the quality.

关 键 词：泄洪洞 高速水流 空蚀 模型试验 掺气坎 平整度 

分 类 号：TV672.1[水利工程—水利水电工程]