基于MIKE21FM数值模拟的某灌区引水口布置优化
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摘要
鉴于引水渠道引水口附近存在较为复杂的流场,且该流场对引水口附近的堤防建设有显著影响,利用MIKE21FM对乌苏里江某引水口进行数值模拟分析,得到了渠道分流比和引水口附近水面线、流速、流向等详细的流场数据。结果表明,渠道分流比过大,渠道进口处水面流速梯度较大,水流出现的侧向收缩产生了局部水头损失,不利于水流的平稳流动,据此提出了两种优化方案,并进行了数值试验验证,确定了最优方案为方案2,可有效减少局部水头损失。
There is a complex flow field near the water intake,which has a significant influence on the construction of the embankment.Therefore,numerical simulation of a certain diversion intake in Wusulijiang river was carried out by MIKE21 software.The total results hold the detailed information about split ratio and flow field data which contains the water lines and flow velocity.The results indicate that the split ratio of the channel is oversized high and the channel inlet water flow velocity gradient is larger.The lateral shrinkage of water flow caused local water head loss to prevent steady flow of water flow.So,two optimization schemes were proposed,and the optimization schemes were verified by numerical simulation.The optimal scheme 2 shows better and effectively reduces local head loss.
There is a complex flow field near the water intake,which has a significant influence on the construction of the embankment.Therefore,numerical simulation of a certain diversion intake in Wusulijiang river was carried out by MIKE21 software.The total results hold the detailed information about split ratio and flow field data which contains the water lines and flow velocity.The results indicate that the split ratio of the channel is oversized high and the channel inlet water flow velocity gradient is larger.The lateral shrinkage of water flow caused local water head loss to prevent steady flow of water flow.So,two optimization schemes were proposed,and the optimization schemes were verified by numerical simulation.The optimal scheme 2 shows better and effectively reduces local head loss.
引文
[1]郭凤清,屈寒飞,曾辉,等.基于MIKE21FM模型的蓄洪区洪水演进数值模拟[J].水电能源科学,2013,31(5):34-37.
[2]MIKE21FLOW MODEL FM Hydrodynamic Module User Guide[M].Denmark:DHI Water and Environment,2008.
[3]罗福安,梁志勇,张德茹.直角分水口水流形态的实验研究[J].水科学进展,1995,6(1):71-75.
[2]MIKE21FLOW MODEL FM Hydrodynamic Module User Guide[M].Denmark:DHI Water and Environment,2008.
[3]罗福安,梁志勇,张德茹.直角分水口水流形态的实验研究[J].水科学进展,1995,6(1):71-75.