摘要
山区河流的大尺度粗糙床面对水流运动特性的影响是航道整治工程中的重要问题。文章基于模型试验研究,并结合CFD计算分析的方法,研究了不同摆放密度的混凝土立方块体对有限水深流动的自由液面波动、纵向流速分布以及纵向水头损失的影响。在此基础上,文章根据水流阻力的影响因素,对传统经验公式开展了相关修正,并采用非线性多元回归法对经验修正系数进行了回归分析。研究结论表明:文章所提出的经验公式具有更加普遍的适用性,且经验公式的预测结果与试验和CFD计算结果相一致,对于航道整治工程具有重要参考价值。
The influence of large-scale rough bed on the flow characteristics of mountain rivers is an important problem in waterway regulation projects.Based on experimental test and CFD calculation,the effects of concrete cube with different arrangement density on free surface fluctuation,plane velocity distribution and longitudinal friction head loss of shallow water flow were studied.On this basis,according to the influencing factors of flow resistance,the traditional empirical formula was modified,and the coefficients in the empirical formula were analyzed by using non-linear multiple regression method.The modified empirical formula presented in this paper has wider applicability,and the predicted results of the empirical formula are consistent with the experimental and CFD results,which has important reference value for waterway regulation engineering.
作者
李春良
朱峰
LI Chun-liang;ZHU Feng(Shandong Provincial Communications Planning and Design Institute CO., LTD., Jinan 250031, China;CCCC-FHDI Engineering Co., Ltd., Guangzhou 510230, China)
出处
《水道港口》
2020年第1期72-77,共6页
Journal of Waterway and Harbor
基金
国家自然科学基金资助项目(51979180)。
关键词
粗糙床面
自由表面形态
沿程水头损失
统计回归分析
rough bed surface
free surface fluctuation
friction head loss
statistical regression analysis
作者简介
李春良(1983-),男,高级工程师,主要从事港口航道、海岸工程研究及管理工作。
