摘要
采用VOF法和k-ε紊流模型相结合对金沙江溪洛渡水电站3#泄洪隧洞泄洪过程进行了数值模拟,针对设计体型存在的第二、第三级掺气坎的掺气空腔长度和高度偏小,龙落尾段的水流流速过高,空化数局部偏小的问题,优化了泄洪隧洞奥奇段体型,调整了掺气坎的布置,使泄洪隧道压强分布更趋均匀,空化数分布趋于平稳,从而改善了泄洪隧洞水流的空蚀空化特性。同时增大了掺气空间,加大了泄洪隧洞的掺气保护长度。
The flood discharge process of 3# flood discharge tunnel at Xiluodu Power Station in Jinsha River has been simulated successfully by means of k-8 turbulence model and VOF（ Volume of Fluid）methods. Aiming at the problems that the length and the height of the second and third aeration cavity is too small, and the local cavitation number is too low, the flood discharge configuration is optimized and aeration banks are adjusted, so that the pressure of the flood discharge tunnel inclines to distribute more homogenous and the distribution of cavitation number inclines to stable, which promotes the character of flow cavitation erosion. In addition, the aeration space is enlarged so as to extend the protecting length of cavitation erosion of flood discharge tunnel.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2009年第5期855-860,共6页
Journal of Chongqing Jiaotong University(Natural Science)
基金
重庆市教委基金项目(KJ050408)
重庆市科委基金项目(CSTC2006EA6008)
重庆交通大学人才启动基金项目(2005-01-16)
关键词
泄洪隧洞
优化体型
紊流数值模拟
VOF法
空蚀
flood discharge tunnel
configuration optimization
turbulent numerical simulation
volume of fluid （VOF） method
cavitation erosion
