突扩明渠分离流中红鲫鱼运动的特点

Characteristics of Red Crucian Carp in the Flow of the Open Channel

为了探讨突扩明渠分离流中红鲫鱼运动的特点,通过特制的鱼类游泳行为观测装置,记录了红鲫鱼在多种流速条件下的运动轨迹,并且利用fluent计算了流场结构和涡量场。结果表明:鱼类在游动过程中对流速或涡量较大变化时会不断调整游动速度以适应水流变化。当所在区域流速、涡量变化非常小时,鱼类游动速度基本不改变,但在徘徊的过程中遇到流速大幅增大或大涡量时,鱼类会出现相应的快速响应情况。

In order to investigate the characteristics of red crucian carp movement in the open stream, the trajectory of red crucian carp under various flow velocity conditions is recorded by a special fish swimming behavior observation device, and the flow field structure and vorticity is calculated by fluent measuring field. The resuhs show that the velocity of the fish will be adjusted to the flow velocity when the flow velocity or vorticity changes greatly during the swimming process. When the flow rate and vorticity change are very small, the swimming speed of the fish is not changed. However, when the flow rate is greatly increased or the vortices are encountered during the wandering process, the fish will respond quickly.