摘要
在分析了表示泵站过水流道断面流速分布均匀性公式不足的基础上,结合河道过流特点,建立了断面有效过流面积率和过流均匀度两个表示过流断面水流流态的公式,并以此作为优化目标函数,利用三维稳态数值模拟方法对某单侧布置的泵闸合建工程消力池和导流翼墙进行了水力优化,经模型试验验证了数模结论的正确性.针对工程的具体情况,得出的结论是:过度增加消力池长度对消能效果产生负作用,可以采取消力池内设置辅助消能工,缩短消力池翼墙的措施改善消能效果;对河床采取抛石防护措施,解决海漫段末端最大水流速大于河床抗冲流速的问题.
Based on the analysis on the disadvantage of the formulas representing cross-section velocity distribution uniformity of inlet conduit of water pumping station, two formulas, namely, the cross-section of effective flow area ratio and the flow uniformity were established by taking river flow characteristics into consideration. Hydraulic optimizations for stilling basin and wing wall of an unilaterally-arranged-pumpgateway were conducted with 3D steady numerical simulation by regarding the formulas as objective function. The results of numerical simulation were verified through the model experiment. According to the engineering condition, it is concluded that the excessive length of the stilling basin has a negative impact on the effect of energy dissipation. Setting auxiliary devices for stilling basin and reducing the length of the wing wall are good choice. Riprap protection at the end of the apron extension can solve the problem that water velocity exceeds the resisting flow velocity of riverbed.
出处
《排灌机械》
EI
2009年第1期43-46,共4页
Drainage and Irrigation Machinery
关键词
消力池
泵闸工程
CFD
目标函数
水力优化
stilling basin
pump-gateway engineering
CFD
objective function
hydraulic optimization
