向家坝地下洞室群施工通风效果三维数值模拟  

3D numerical simulation of construction ventilation effect for underground chamber group of Xiangjiaba Hydropower Station

作　　者：马德萍[1] 李艳玲[1] 莫政宇[1] 叶敏敏[1] 伍仪保[1] 

机构地区：[1]四川大学水利水电学院,四川成都610065

出　　处：《人民长江》2011年第1期29-32,53,共5页Yangtze River

摘　　要：金沙江向家坝水电站右岸地下厂房洞室群结构复杂、规模庞大、施工通风散烟难度大。为优化施工期的通风方案,改善实际通风效果,运用基于流体力学理论的三维数值模拟,对其不同通风方式下的通风流场形态进行了深入研究,定量分析了混合式通风布置、串联风机布置和风机安放位置的选择以及通风竖井等因素对改善其施工通风效果的作用,提出了洞内串联风机安放位置直接影响通风效果、负压通风机应距新鲜风源点较近等建议。The underground chamber group of Xiangjiaba Hydropower Station is characterized by complicated structures,large scale and difficulty in ventilation and smoke dissipation.For optimizing the ventilation plan to improve actual ventilation effect,we further studied the ventilation flow fields under different ventilation modes by 3D numerical simulation based on fluid mechanics theory,and quantitatively analyze the ventilation effects of several ventilation modes such as composite ventilation layout,serial arrangement,position selection of blowers and ventilation shaft.The simulation results show that the position of blowers directly influence the ventilation effect.It is suggested that the arrangement of negative-pressure blowers should be close to the fresh air source.The research results can provide the theoretic base and technical support for the ventilation design of similar projects.

关 键 词：三维数值模拟 水电站地下洞室群 施工通风 通风效果 影响因素 向家坝水电站 

分 类 号：TV554.15[水利工程—水利水电工程]