In order to study the velocity distribution in curved river of backwater conditions, flume experiments with different backwater degrees are carried out in 90° curved rivers. After a detailed measurement and analysis of the three-dimensional flow velocity in the bend by ADVP, it is found that the hydrodynamic axes of different backwater degrees are basically the same before the bend top section, the position of the hydrodynamic axes shifting to the concave bank is closer to the downstream with the increase in backwater after the top section. As for the same section, with the increase in backwater, the water depth and the average velocity decreases gradually, the distribution of longitudinal velocity and transverse velocity becomes more uniform.
Key words
backwater /
bend flow /
hydrodynamic axis /
longitudinal velocity /
transverse velocity
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References
[1]张玉萍. 弯道水力学研究现状分析[J]. 武汉大学学报(工学版), 2000,33(5):35-39.
[2]刁明军, 杨海波, 李斌华, 等. 弯道水力学研究现状与进展[J]. 西南民族大学学报(自然科学版), 2007,33(3):596-601.
[3]哈岸英, 刘磊. 明渠弯道水流运动规律研究现状[J]. 水利学报, 2011,42(12):1 462-1 469.
[4]ZENG J, CONSTANTINESCU G, WEBER L. 3D calculations of equilibrium conditions in loose-bed open channels with significant suspended sediment load [J]. Journal of Hydraulic Engineering, 2010,136(9):557-571.
[5]ABHARI M N, GHODSIAN M, VAGHEFI M, et al. Experimental and numerical simulation of flow in a 90°bend [J]. Flow Measurement & Instrumentation, 2010,21(3):292-298.
[6]SHAMS M, AHMADI G, SMITH D H. Computational modeling of flow and sediment transport and deposition in meandering rivers [J]. Advances in Water Resources, 2002,25(6):689-699.
[7]LU W Z, ZHANG W S, CUI C Z, et al. A numerical analysis of free-surface flow in curved open channel with velocity–pressure-free-surface correction [J]. Computational Mechanics, 2004,33(3):215-224.
[8]白玉川, 高术仙, 徐国强. 常曲率U型弯道水流结构与泥沙冲淤试验研究[J]. 水利水电技术, 2016,47(9):75-79.
[9]张小峰, 金栋, 卢新华,等. 明渠减速流下床面摩阻流速研究[J]. 华中科技大学学报(自然科学版), 2014(10):113-118.
[10]徐军辉. 壅水条件下水流特性及悬移质泥沙淤积试验研究[D]. 武汉：长江科学院, 2013.
[11]AFZALIMHR H, DEY S, RASOULIANFAR P. Influence of decelerating flow on incipient motion of a gravel-bed stream [J]. Sadhana, 2007,32(5):545-559.
[12]杨洁. 壅水条件下水流结构及床面泥沙起动研究[D]. 武汉：长江科学院, 2016.
[13]金中武, 徐军辉, 吴华莉. 壅水条件下水流阻力试验研究[J]. 长江科学院院报, 2015(4):45-50.
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