超长并排双导流隧洞泄洪安全三维数值模拟分析  

Numerical Simulation Analysis of Flood Discharge Safety in Ultra-Long Double Diversion Tunnel

作　　者：罗文俊 罗永钦 罗乐 张文武 王欣虎 LUO Wenjun;LUO Yongqin;LUO Le;ZHANG Wenwu;WANG Xinhu(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;Power China Kunming Engineering Corporation Limited,Kunming 650051,China)

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]中国电建集团昆明勘测设计研究院有限公司,云南昆明650051

出　　处：《昆明理工大学学报（自然科学版）》2024年第6期110-120,共11页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(42467009);云南省“兴滇英才支持计划”青年人才项目(KKRD202204020);华能集团科技项目(HNKJ22-H107);云南省基础研究计划项目青年项目(202101AU070156).

摘　　要：某大型工程双导流洞是并排的近距离导流水工建筑物,洞身长、共用出口,其运行期间的安全性备受关注.采用三维紊流数学模型,对长度超3000 m、间隔为40 m的双导流洞,不同工况同时运行时的泄流能力、洞身及堵头段、进出口水力特性进行分析.结果表明:双导流洞整体布置设计合理,数值计算泄流量与现有公式吻合良好;两条导流洞洞身无不利水力指标且基本一致,两洞出口水流的相互干扰较小;堵头布置位置及体型合理;小流量工况下,各导流洞内均会存在长水跃、明满流现象,宜加强此区域的结构防护与补气设计.超长并排双导流洞应用于工程是可行的,成果为同类长距离并排导流洞设计、运行提供技术支撑.The double diversion tunnels of a large-scale project are closely spaced,parallel hydraulic structures with a shared outlet and a length exceeding 3000 meters and on interval of 40 meters.The safety of their operation has been a subject of great concern.In this paper,a three-dimensional turbulent mathematical model was employed to analyze the flow capacity,tunnel body and plug section,as well as the hydraulic characteristics of the inlets and outlets of the double diversion tunnels under different operating conditions.The results indicate that the overall layout and design of the double diversion tunnels are reasonable,with the calculated flow rates from numerical simulations matching well with existing formulas.There are no adverse hydraulic indicators in the bodies of the two tunnels,and they are essentially consistent with each other.The mutual interference of the water flow at the outlets of the two tunnels is minimal.The positioning and shape of the plug are also reasonable.Under low flow conditions,long hydraulic jumps and open channel flow phenomena will occur in both tunnels,suggesting that structural protection and air injection design in these areas should be strengthened.The application of ultra-long parallel double diversion tunnels in engineering is feasible,and the findings provide technical support for the design and operation of similar long-distance parallel diversion tunnels.

关 键 词：超长隧洞 双导流洞 数值模拟 泄洪安全 水力特性 

分 类 号：TV135.2[水利工程—水力学及河流动力学]