【摘要】 养殖网箱内的流体速度跟鱼类的生长密切相关。为研究养殖网衣周围的流场特性，本文针对一种平面刚性网衣，基于CFD理论，采用多孔介质模型，对单片网衣的流场进行了数值模拟，首先进行数值不确定度分析，再对不同流速和不同攻角下的网衣流场进行数值计算，并与试验结果进行对比，最后对网衣的流场特性进行分析。结果显示：本文网衣阻力和升力的计算结果与试验结果吻合良好，表明本文方法可以准确地预报网衣受力及周围流场；在网衣周围，流体速度下降较快，在超过一定长度后，流体速度变化趋于缓慢；随着来流速度的增加，网衣对水流的阻挡作用逐渐减弱。本文数值模拟方法可用于养殖网箱流场的数值模拟，具有一定的学术研究和工程实用价值。更多还原

【Abstract】 The velocity of fluid in the aquaculture cage is closely related to the growth of fish.In order to study the characteristics of the flow field around the aquaculture plane net, the flow field of a rigid plane net was simulated numerically based on CFD theory and by using the porous media model.Firstly, the uncertainty analysis of the flow field was carried out, and then the numerical calculations were carried out in the plane net at different angles and velocity, and the results were compared with the experimental results.The results showed that the calculation results of the resistance and the lift of the plane net were consistent with the experimental results, which indicated that the method can accurately predict the force of the plane net and the flow field around the plane net.The velocity of the fluid near the net decreased quickly, then after a certain length the velocity of the fluid changed slowly.The blocking effect of the plane net on the flow gradually decreased when the velocity of the flow increased.The numerical simulation method in this paper could be used to simulate the flow field of the plane net, which had some academic research value and engineering practical value.更多还原