游弋式养殖平台养殖舱形状对适渔性影响的数值模拟

Numerical Simulation on Fish Suitability Influence of the Breeding Tank in the Cruising Aquaculture Platform

基于Realizable k-ε湍流模型,开展游弋式养殖平台养殖舱形状对养殖舱适渔性的影响的数值模拟研究。通过将数值模拟结果与现有试验结果进行对比,验证该数值模拟方法的有效性。通过对比有无两侧肩收角和有无中部肩收角两组工况下的流场特性,明确设置在养殖舱两侧和养殖舱中部的肩收角对养殖舱适渔性的改善程度。结果表明:设置两侧肩收角和中部肩收角均能通过提高养殖舱的平均适渔体积比来改善养殖舱在晃荡状态下的适渔性,但两者对适渔性的影响机理有所不同,且中部肩收角对养殖舱适渔性的提升作用远大于两侧肩收角。

Based on the Realizable k-εturbulence model,the influence of the shape of the breeding tank on the fish suitability is studied.The effectiveness of the numerical method is verified by comparing with the existing experimental results.By comparing the flow field characteristics under the two groups of cases,the improvement of the fish suitability by setting the shoulder angle on both sides and in the middle is clarified.The results show that the shoulder angle on both sides and in the middle can improve the fish suitability of the breeding tank under the sloshing state by increasing the average fish suitability volume ratio of the sloshing tank,but the influence mechanism of the two on the fish suitability is different.Moreover,the improvement of the fish suitability of the sloshing tank by the shoulder angle in the middle is much greater than that of the shoulder angle on both sides.