某水库发电引水洞岔管体型优化研究  

Optimum Research on Bifurcation Type of Power Generation Diversion Tunnel in a Reservoir

作　　者：吴亮[1] WU Liang(Investigation and Research Institute of Water Resources and Hydropower of Xinjiang Uygur Autonomous Region,Ministry of Water Resources,830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《广东水利水电》2022年第5期18-24,共7页Guangdong Water Resources and Hydropower

摘　　要：针对某水电站扩机后原深孔泄洪洞旁发电引水岔管内中隔墩墩头受水流冲击较大、两侧动水压强分布不均等现象,采用水工模型试验与数值模拟相结合的研究方法,分析了原体型岔管水力特性,在此基础上提出多种优化方案,并进行动水压强复核。研究结果表明:优化方案3通过对墩头局部圆化处理以及后撤1.1 m的措施,可将中墩两侧水头差降至1 m以内,同时有效改善了水流冲击问题,也可保证泄洪过程中电站进水结构的安全,可为工程设计提供优化建议。Aiming at the phenomena that the pier head of the middle pier in the diversion bifurcation pipe near the original deep-hole flood discharge tunnel is greatly impacted by water flow and the distribution of dynamic water pressure on both sides is unequal after the expansion of a hydropower station.In this paper,the research method combining hydraulic model test with numerical simulation is used to analyze the hydraulic characteristics of original bifurcated pipe.On this basis,several optimization schemes are put forward and the hydrodynamic pressure is checked.Finally,it is concluded that the optimized scheme 3 can reduce the head difference between the two sides of the middle pier to less than 1m by means of local rounding treatment of the pier head and withdrawal of 1.1M.Meanwhile,it can effectively improve the water flow impact and ensure the safety of the intake structure of the power plant during flood discharge.Therefore,it is recommended to use this scheme.

关 键 词：发电引水洞 数值模拟 动水压强 岔管体型 

分 类 号：TV732.43[水利工程—水利水电工程]