摘要
引航道口门区水流条件的好坏将直接影响船舶的行驶安全,因此对其研究具有重要的意义。以景洪电站为研究背景,将引航道透空隔水墙的闸孔出流通过流量相等原则等效为堰流出流,把多连通计算域变为单连通计算域,此方法便于在平面上修改节点高程,解决了平面二维水流数学模型难以处理多连通域边界的问题。计算结果表明,按透空结构的隔水墙边界处理后,最大回流、最大纵流、最大横流有着不同程度的减弱,且最大回流的减弱程度最为明显,这与物理模型的试验结果相比也是吻合的,说明等效堰流法处理此类边界较为有效,计算结果符合实际。
It is of great significance to study the flow condition at the entrance area of approach channel,which will directly affect the safety of the ship. Based on Jinghong Power Station,the orifice outflow of permeable core wall at approach channel was equivalently turned into weir outflow through the principle of equal flow,and the multi-connected calculation domain was changed into the single-connected one. The proposed method was convenient for modifying plane node elevation,and it effectively solved the problem that the two-dimensional flow mathematical model was difficult to deal with the multiconnected domain boundary. The calculation results show that: the maximum reflux,maximum longitudinal flow and maximum transverse flow are weakened in different degrees after the boundary processing of core wall with permeable structure,and the weakening degree of maximum reflux is the most obvious,which is also consistent with the experimental results of physical model. It shows that the equivalent weir flow method is effective in dealing with this kind of boundary,and the calculation results are consistent with the actual situation.
作者
蒋孜伟
许光祥
童思陈
JIANG Ziwei;XU Guangxiang;TONG Sichen(School of River&Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《重庆交通大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第1期98-102,共5页
Journal of Chongqing Jiaotong University(Natural Science)
基金
国家重点研发计划项目(2018YFB1600400)
重庆市基础研究与前沿探索项目(cstc2018jcyjAX0534)
关键词
航道工程
引航道口门区
透空隔水墙
数值模拟
多连通域
单连通域
waterway engineering
entrance area of approach channel
permeable core wall
numerical simulation
multi-connected domain
single-connected domain
