高水头大流量泄洪隧洞水力特性数值模拟研究  

Numerical Simulation Study on Hydraulic Characteristics of High Head Large Discharge Spillway Tunnel

作　　者：杨忠超[1] 刁明军[2] 邓军[2] 

机构地区：[1]重庆交通大学内河航道整治技术交通行业重点实验室,重庆400074 [2]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《水电能源科学》2010年第2期78-81,共4页Water Resources and Power

基　　金：重庆市教委基金资助项目(KJ050408);重庆市科委基金资助项目(CSTC2006EA6008);重庆交通大学人才启动基金资助项目(2005-01-16)

摘　　要：采用VOF法和k-ε紊流模型对金沙江溪洛渡水电站高水头、大流量泄洪隧洞水力特性进行数值模拟,获得了泄洪隧洞的流动过程、流量系数、水面线、流速分布、压力分布、空化数分布、掺气量等水力学参数,并分析了对泄洪隧洞安全的影响。结果表明,泄洪隧洞的泄流能力满足设计要求,设计体型基本合理,龙落尾段需进一步优化,第二、三级掺气空腔的长度和高度均偏小,掺气坎两侧通风竖井的风速偏大,掺气坎需优化。The hydraulic characteristics of spillway tunnel of Xiluodu Hydropower Station with high head large discharge in Jinsha River has been simulated by the k-εturbulence model and Volume of Fluid （VOF） method. The hydraulic parameters including flow process, discharge coefficient, river surface profile, distribution of velocity, pressure, cavitation numbers and aeration quantity have been obtained. And the influence of safe on the spillway tunnel is analyzed. The results show that the discharge capacity meets design requirements; the design shape is reasonable basically; spillway tunnel curving segment need to be optimized; the length and height of the second and third aeration cavity are too small; the wind speed in ventilation shaft is too big, which makes the aeration bank need to be optimized.

关 键 词：水力学 紊流数值模拟 VOF法 泄洪隧洞 空蚀 

分 类 号：TV135.2[水利工程—水力学及河流动力学]