Experimental study on effect of reducing current velocity by square net cage structure
Experimental study on effect of reducing current velocity by square net cage structure
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发表时间：
2007
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通讯作者：
Zhu Lixin
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作者：
Zhu Lixin
根据深海网箱的尺寸，设计了一种方网结构模型。试验在圆形水槽中进行。目前的速度是使用设置在结构前面的三维测速仪测量的。用测速仪也测量了结构后面位置的速度。然后对数据进行分析，找出降低流速的效果。结果表明：(1)减小电流的区域位于与电流方向垂直的净投影处。笼体两侧的流速增加了一点。(2)试验速度分别为32.23cm/s、50.19cm/s和67.79cm/s，分别等于实际速度45.58cm/s、70.98cm/s和95.67cm/s。方网结构后的降速百分比在20% ~ 45%之间，接近于相对合流。(3)测量距离为构筑物后50cm ~ 125cm，等于实际距离15m ~ 37.5m。降低电流速度的效果是明显的。
A model square net structure was designed according to the dimension of deep-sea cage.The experiment was carried out in circular flume.The current velocity was surveyed using a 3D velocimeters set in front of the structure.The velocities at the positions behind the structure were also measured using the velocimeters.Then the data was analyzed,the effect of reducing current velocity was found out.The conclusions are:(1)The area of reducing current is located at the projection of net vertical to the current direction.The current velocity of both sides of cage increases a bit.(2)Testing velocities are 32.23cm/s,50.19cm/s and 67.79cm/s,which equal actual velocities 45.58cm/s,70.98cm/s and 95.67cm/s.The percentage of reducing velocity behind the square net structure is between 20% and 45%,which is close to the relative collusions.(3)Surveyed range is from 50cm to 125cm behind the structure,which equals actual range from 15m to 37.5m.The effect of reducing current velocity is apparent.