Experimental modification of the internal solitary wave force exerted on a horizontal transverse cylinder due to wave-flow and vortex shedding
Experimental modification of the internal solitary wave force exerted on a horizontal transverse cylinder due to wave-flow and vortex shedding
复制标题
由于波流和涡脱落而施加在水平横向圆柱体上的内孤立波力的实验修正
DOI：
10.1016/j.oceaneng.2022.113513
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发表时间：
2023-02
影响因子：
5
通讯作者：
Pu Xuan
中科院分区：
文献类型：
--
作者：
Shaodong Wang;Hui Du;Gang Wei;Pai Peng;Pu Xuan
基于重力分层流体槽中水平横向圆柱体ISW力的实验测量，利用最小二乘法、小波变换等参数优化方法，提出了ISW力计算中经验系数的修正公式。获得了ISW对水平横向圆柱体施加的波浪力、折重力、涡脱落力等各种力的时间序列和空间特征，提高了其描述精度。结果表明，作用在水平横向圆柱体上的力涉及经验系数，包括莫里森公式中的惯性力系数C m 和曳力系数C d ，以及由涡旋脱落频率ω s 得出的涡旋脱落升力系数C l ，其中利用实验数据将经验系数和涡旋脱落频率与雷诺数R e (1000~3000)的拟合修正公式近似为指数函数分别为函数和多项式函数。修正系数的ISW力的计算精度较常数系数的力有显着提高，修正后的水平力和垂直涡脱落升力的平均相对误差分别降低了约71%和46%。此外，还获得了一些更接近实际过程的特征描述，包括各种力的时间序列变化、其对水平推拉力、垂直向下阻力或“双峰”力的贡献，以及其随圆柱体浸没深度变化的空间变化，进一步加深了对ISW作用于结构物体的时空特征的理解。
Based on the experimental measurements of the ISW force on a horizontal transverse cylinder in a gravitationally stratified fluid flume, the modification formulas of the empirical coefficients in the ISW force calculations are proposed by use of parameter optimization methods such as the least square method and wavelet transform. The time series and spatial characteristics of various forces exerted on a horizontal transverse cylinder by an ISW, including the wave force, the reduced gravity and the vortex shedding force, were obtained, and their description precision was improved. It is shown that those forces exerted on a horizontal transverse cylinder involve the empirical coefficients, including the inertial force coefficient C m and the drag force coefficient C d in the Morison formula, and the vortex shedding lift coefficient C l in virtue of the vortex shedding frequency ω s, in which the fitting modification formulae of the empirical coefficients and vortex shedding frequency with the Reynolds number R e (1000–3000) by use of experimental data are approximated to the exponential function and the polynomial function, respectively. The calculation accuracy of the ISW force with modified coefficients is significantly improved compared with those forces having constant coefficients, in which the average relative errors of the horizontal force and the vertical vortex shedding lift with modifications are reduced by approximately 71% and 46%, respectively. In addition, some characteristic descriptions closer to the actual processes are obtained, including the time series variation of various forces, its contribution to the horizontal pushing or pulling force, and to the vertical downward drag or the'double peak'force, and to its spatial variation with varying cylinder submerged depth, which further improves the understanding of the temporal and spatial features of the ISW acting on structural objects.
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影响因子：
1.6
作者：
Rui-rui Zhang;Hong-wei Wang;Ke Chen;Y. You;Shuguang Zhang;Xiaolu Xiong
通讯作者：
Rui-rui Zhang;Hong-wei Wang;Ke Chen;Y. You;Shuguang Zhang;Xiaolu Xiong
影响因子：
4.6
作者：
H. Du;G. Wei;Shao-dong Wang;Xin-long Wang
通讯作者：
H. Du;G. Wei;Shao-dong Wang;Xin-long Wang
影响因子：
3.6
作者：
Jieshuo Xie;Jiexin Xu;S. Cai
通讯作者：
Jieshuo Xie;Jiexin Xu;S. Cai
影响因子：
4.3
作者：
S. Cai;Xiaomin Long;Sheng’an Wang
通讯作者：
S. Cai;Xiaomin Long;Sheng’an Wang
不同深度桩段内孤波流场及荷载特性试验研究
影响因子：
5
作者：
Wang Fei;Sun Rui;Wang Chunxiao;Fu Qiang;Li Peng;Guo Haiyan
通讯作者：
Guo Haiyan