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为采用数学模型研究三峡两坝间的通航水流条件,在曲线坐标系与同位网格模式下,利用有限体积法离散水流控制方程,采用S IM PLEC算法与界面动量插值法计算了室内试验与天然河流弯道三维流场,并用实测资料对室内弯道三维水流的计算成果进行了验证分析。结果表明,三维水流数学模型的计算值与实测值基本吻合。计算结果反映了弯道水流特性,弯道环流明显,且表层水流指向凹岸,底层水流指向凸岸。
In order to study the condition of navigation flow between the Three Gorges Dam by mathematical model, the discrete water flow control equations of the finite volume method are used in the curvilinear coordinate system and the co-location grid mode. The S IM PLEC and interface momentum interpolation are used to calculate the inter- River flow three-dimensional flow field, and with the measured data on the indoor curved three-dimensional flow calculation results were verified. The results show that the calculated value of the three-dimensional flow mathematical model is basically consistent with the measured value. The calculation results reflect the curve flow characteristics, the curve circulation is obvious, and the surface water flow points to the concave bank, the bottom flow points to the convex bank.