三峡工程多级船闸中间引渠水力学问题的数值计算研究

The Computations of Unsteady Flow in Middle Channel Between Ship Locks of Three Gorge Project

用插值元法建立的明渠二维非恒定流数学模型,成功地计算了具有复杂几何边界条件的三峡枢纽船闸引渠非恒定流问题。计算中提出了水体校正的必要性和具体方法,又对计算支渠来流附加动水作用的常用方法作了修正,使计算出来的波高和周期,以及流态具有可靠精度。 本文还讨论了引渠水流碍航标准问题,提出了具体看法。对渠道形状的选择,对如何加速波浪的衰减提出了原则设想,这些都可供设计参考,并为今后进一步研究改善水流条件打下了基础。

The 2-D mathematical model for unsteady flow in open channel had been established by employing Interpolation Element method. It had been successeful in computing unsteady flow in middle channel between ship locks of Three Gorge project. The channel has a complox boundary. Many new method had been gained in the process of computing, Such as. Total water volum correction. An improved equation for computing extra momentum of inflow in branch cannal. After all of this, th epredicted wave height, wave period and flow partten have good precision.Many problems are discussed in the paper, such as. what is the limitations of allowable wave heights and flow velocities. How to select the shape of channel. How to make waves to decay quickly. Good opinions are given for reference.