低Fr 数溢洪洞掺气设施的优化分析  

Optimum Analysis of Aeration Facilities in Spillway Tunnel with Low Fr Number

作　　者：郭港归 黄锋 李国栋[1] GUO Gang-gui;HUANG Feng;LI Guo-dong(Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学,陕西西安710048

出　　处：《云南水力发电》2022年第2期82-87,共6页Yunnan Water Power

摘　　要：小底坡低弗劳德数泄洪洞空腔回水问题较为严重,某水电站溢洪洞存在类似问题。对该电站2号溢洪洞进行三维数值模拟分析,原方案1号掺气坎处存在大尺度积水层,堵塞通气孔而无法掺气。缓底坡下空腔回水受水舌冲击角、弗劳德数的影响较大,针对以上两类影响因素对该工程进行掺气坎体型优化。对优化方案进行模拟得出各水力要素,并与试验结果进行对比,验证掺气坎体型基本合理。Backwater in cavity of spillway tunnel with low Fr number on small slope is a serious problem,and similar problems exist in spillway tunnel of a hydropower station.In this paper,3-dimensional numerical simulation analysis is carried out for No.2 spillway tunnel of the hydropower station.In the original scheme,large-scale water accumulation exists at the No.1 aeration sill,which blockages the ventilation holes and is unable to be aerated.Backwater of cavity on gentle bottom slope is greatly affected by impact angle of jet and Fr number.Aiming at the above two factors,the shape of the aeration sill is optimized.In this paper,the optimization scheme is simulated to get each hydraulic element,and compared with the test results to verify that the shape of the doping sill is reasonable.

关 键 词：空腔回水 数值模拟 水舌冲击角 VOF模型 

分 类 号：TV131.39[水利工程—水力学及河流动力学] TV651.3