摘要
水库溢流式取水口作为一种有效缓解下泄低温水的分层取水措施,得到了越来越广泛的应用,糯扎渡水电站拟采用溢流式取水口.为较好地模拟取水口前库区复杂的地形边界,采用σ坐标系,建立了糯扎渡水电站溢流式取水口下泄水温的三维数值模型,数值模拟结果得到了物理模型试验结果的验证.在水库水温分布已知的条件下,数值模拟了取水口不同引水流量和开启组合的下泄水温.取水口引水流量越大,下泄水温越高;下泄水温提高的幅度,不仅取决于引水流量,还取决于水库水温垂向分布.取水口开启组合对下泄水温影响较小.
Overflow intake as an effective method to enhance the temperature of water released has got more and more popularity. A multi-level intake structure with stoplog gate was adopted in Nuozhadu Hydropower Station. The σ-coordinate was adopted to better adapt to the complex topographical condition of the reservoir in front of the intakes, and the 3D numerical model to simulate water temperature released from the multi-level intake of Nuozhadu Hydropower Station was established.The numerical results of water temperature released were tested validly by the physical model experiment results.Based on the water temperature data of Nuozhadu Reservoir, the temperatures of the water released from the intake under different discharge and open scheme combination were simulated in a typical normal year.The results showed that the larger of the discharge, the higher of the temperature of water released.The rate of enhancing discharge water temperature depends not only on the discharge of intake, but also the vertical distribution of water temperature in reservoir.Effect of open combination on temperature of water released is very small.
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2015年第1期145-153,共9页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51279125)
博士点基金项目(200800560042)
河北省教育厅基金项目(QN20131021)
关键词
分层取水
溢流式取水口
叠梁门
下泄水温
三维数值模拟
selective withdrawal
overflow intake
stoplog gate
temperature of water released
3D numerical simulation
