飞碟型网箱水动力模型试验与理论计算比较

The comparison between results of model test and theoretical calculations of the hydrodynamic resistance of Sea Station cage

通过飞碟型网箱模型试验,得出网箱水阻力和网箱网形的变化与流速之间的关系。网箱总阻力与箱体网衣湿水面积成正比,正常工作环境下网箱水阻力与流速之间成F=36090×V1.7904的关系。理论计算值一般比模型试验所得的网箱水阻力小10%左右。随着流速增加,网箱立柱向前倾斜的程度略为增加,当水流达到2kn时,其倾斜角约为5°。模型试验中,网箱网衣在不同的流速下变形不大,网箱容积基本保持不变。

This paper shows the relationship between the hydrodynamic resistance, the deformation of shape of the Sea Station cage and the current velocity by the model test. The results indicated the gross drag of the cage is proportional to the area of the net enclosure which is soaked in water and the function of the resistance to the current velocity is F=36090×V^(1.7904)in normal condition. In addition, the water resistance obtained from theoretical calculation was usually 10 percent less than that from model test. While the current velocity increased, the slope of the cage spar increased gradually. The angle of slope is about 5 degrees when the current velocity reached 2kn. In the model test, the shape of the net enclosure and the volume of the cage almost kept constant in various conditions.