Experimental Measurements on the Influence of Inlet Pipe Configuration on Hydrodynamics and Dissolved Oxygen Distribution in Circular Aquaculture Tank

文献类型： 外文期刊

第一作者： Wu, Yanfei

作者： Wu, Yanfei;Chen, Jianeng;Zhang, Qingjing;Chen, Jianeng;Gui, Fukun;Feng, Dejun;Zhang, Qingjing;Qi, Hongfang;Wang, Yang;Luo, Ying;Wu, Yanhong;Zhang, Qingjing

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关键词： circular tank; hydrodynamic characteristics; inlet; uniformity coefficient; dissolved oxygen

期刊名称：WATER （ 影响因子：3.0； 五年影响因子：3.3 ）

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年卷期： 2025 年 17 卷 15 期

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收录情况： SCI

摘要： Optimizing hydrodynamic performance and dissolved oxygen (DO) distribution is essential for improving water quality management in industrial recirculating aquaculture systems. This study combines experimental measurements and data analysis to evaluate the effects of the inlet pipe flow rate (Q), deployment distance ratio (d/r), deployment angle (theta), inlet pipe structure on hydrodynamics and the dissolved oxygen distribution across various tank layers. The flow field distribution in the tanks was measured using Acoustic Doppler Velocimetry (ADV), and the hydrodynamic characteristics, including average velocity (vavg) and the velocity uniformity coefficient (DU50), were quantitatively analyzed. The dissolved oxygen content at different tank layers was recorded using an Aquameter GPS portable multi-parameter water quality analyzer. The findings indicate that average velocity (vavg) and the velocity uniformity coefficient (DU50) are key determinants of the hydrodynamic characteristic of circular aquaculture tanks. Optimal hydrodynamic performance occurs for the vertical single-pipe porous configuration at Q = 9 L/s, d/r = 1/4, and theta = 45 degrees,the average velocity reached 0.0669 m/s, and the uniformity coefficients attained a maximum value of 40.4282. In a vertical single-pipe porous structure, the tank exhibits higher dissolved oxygen levels compared to a horizontal single-pipe single-hole structure. Under identical water inflow rates and deployment distance ratios, dissolved oxygen levels in the surface layer of the circular aquaculture tank are significantly greater than that in the bottom layer. The results of this study provide valuable insights for optimizing the engineering design of industrial circular aquaculture tanks and addressing the dissolved oxygen distribution across different water layers.

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