开敞水域中航槽流场的数值模拟

Numerical Simulation of Velocity Field in a Dredged Channel

建立了一个模拟开敞水域中航槽流场的平面二维数学模型．利用该模型计算得到的流速分布与袁美琦、李安中等人试验值相吻合，并计算了相当于天然情况下（各种水深、挖深比及航槽与水流的不同交角）的流场，得到了各种航槽与水流交角、不同挖深比的航槽流速折减系数变化规律图，及各种航槽与水流交角、不同挖深比的航槽中流向与航槽轴线交角的变化规律图，为开敞水域中航槽选线设计提供了依据。

A two-dimensional mathematical model of velocity fiel;d in a dredged channel at oblique angle to flow directin in open water is established in this paper.The calculated results are consistent with the experiment results by Yuan Meiqui,Li Anzhong etc.The velocity fields of natural condition(e.g.every dind of depth depth ratio,and angle between a degreded channel and flow direction)are calculated by this model. The figure of the coefficient of velocity ratio versus oblique angale with depth ratio (fig.4)and the figure offlow direction in the middle of the gredged channel with dredged channel versus oblique angle with depth ratio(fig.5)are obtained.Therefore,a basis is provided for selecting a proper direction for a dredged channel.