基于Flow-3D的抗拖网海床基冲刷数值模拟
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摘要
基于Flow-3D软件,建立抗拖网海床基沙土基床冲刷的三维数学模型,控制水流流速和泥沙粒径,对不同条件下抗拖网海床基周围沙土基床的冲刷进行数值模拟,并分析了抗拖网海床基最大冲刷深度随这两种因素改变的趋势。结果表明,抗拖网海床基沙土基床冲刷坑深度随海流流速增大而增加,在设定其他条件不改变的情况下,冲刷坑的加深速度随着流速增大会逐渐减缓,最终达到冲淤平衡。同时,由于海底环境复杂多变,导致模型与实际情况有一定的差异,还需在后续的研究中进一步进行优化。
Three-dimensional mathematical model of scour around Trawl Resistant Seabed Basement on sand bed was established using Flow-3 D. By changing the flow velocity and sediment particle size,the scour on sand bed under different conditions was simulated,and the changes in the trend of maximum scour depth around Trawl Resistant Seabed Basement with the two factors was analyzed. The results show that the scour depth around Trawl Resistant Seabed Basement is increased with current velocity increases,under the other setting conditions unchanged,the scour pit deepened velocity with increasing flow velocity is gradually slowed down,and ultimately achieved sedimentation balance. At the same time,due to the complex and changeable seabed environment,the model and the actual situation are different,and therefore further research should be continued.
Three-dimensional mathematical model of scour around Trawl Resistant Seabed Basement on sand bed was established using Flow-3 D. By changing the flow velocity and sediment particle size,the scour on sand bed under different conditions was simulated,and the changes in the trend of maximum scour depth around Trawl Resistant Seabed Basement with the two factors was analyzed. The results show that the scour depth around Trawl Resistant Seabed Basement is increased with current velocity increases,under the other setting conditions unchanged,the scour pit deepened velocity with increasing flow velocity is gradually slowed down,and ultimately achieved sedimentation balance. At the same time,due to the complex and changeable seabed environment,the model and the actual situation are different,and therefore further research should be continued.
引文
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[2]WANG Fu-jun.Principle and application of CFD software for computational fluid dynamics analysis[M].Beijing:Tsinghua University Press,2004.王福军.计算流体动力学分析:CFD软件原理与应用[M].北京:清华大学出版社,2004.
[3]XU Jiong-xin,HU Chun-hong,CHEN Jian-guo.The influence of sediment of different size groups on the deposition of the lower reaches of the Yellow River and its significance in the management of the Yellow River[J].Science in China:Series E,2009,39(2):310-317.许炯心,胡春宏,陈建国.不同粒径组泥沙对黄河下游沉积的影响及其在黄河治理中的意义[J].中国科学:E辑,2009,39(2):310-317.
[4]ZHAO Yan-fei.Three-dimensional numerical simulation of wave force on the offshore wind turbine structure and scour around foundation[D].Tianjing:Tianjin University,2010.赵雁飞.海上风电支撑结构波浪力及基础冲刷的三维数值模拟研究[D].天津:天津大学,2010.
[5]YUAN Yao-chu,ZHAO Jin-ping,WANG Hui-qun,et al.Observations of 450 m currents in the shallow and deep layers of the northeastern South China Sea and their spectral analysis[J].Science in China:Series D,2002,32(2):163-176.袁耀初,赵进平,王惠群,等.南海东北部450 m以浅水层与深水层海流观测结果及其谱分析[J].中国科学:D辑,2002,32(2):163-176.