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

Abstract: 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 multi-connected 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.

Key words: waterway engineering, entrance area of approach channel, permeable core wall, numerical simulation, multi-connected domain, single-connected domain