Abstract Measurements were performed inside and in the wake of a commercial salmon sea cage. The key instrumentation included the following: sea bottom-mounted acoustic Doppler current profilers providing continuous concurrent flow velocity and turbulence information about the water columns; vessel-mounted acoustic current profilers mapping the flow pattern around the wake of the cage in a selected incoming flow; a microstructure profiler measuring the fluctuations in vertical shear in the dissipation range; an acoustic Doppler velocimeter measuring the velocity inside the sea cage; dissolved oxygen sensors and echosounders measuring the distribution of fish inside the cage. The measurements have performed with stocked and emptied sea-cage. The results showed simultaneous strong flow reductions in the wake near the cage and high turbulence in the upper part of the water column, both of which were generated by the sea cage. Measurements inside the cage showed that although the schooling fish reduced the flow, there was no evidence that they generate secondary radial and vertical flows.

中文翻译：

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鱼海网箱内的湍流和流场变化及其尾流

摘要 在商业鲑鱼海网箱内部和之后进行了测量。关键仪器包括：海底安装的声学多普勒海流剖面仪，提供有关水柱的连续并发流速和湍流信息；安装在容器上的声流剖面仪在选定的流入流中绘制笼尾周围的流动模式；测量耗散范围内垂直剪切波动的微观结构轮廓仪；测量海笼内速度的声学多普勒测速仪；溶解氧传感器和测深仪测量网箱内鱼的分布。测量是在放养和清空的海笼中进行的。结果表明，网箱附近的尾流同时出现了强烈的流量减少和水柱上部的高湍流，这两者都是由海网箱产生的。网箱内的测量表明，虽然群鱼减少了流量，但没有证据表明它们会产生二次径向和垂直流。