摘要
该文采用k-ε双方程模型模拟流场,选用VOF模型模拟自由面,依据物理实验条件对交汇式河流进行了三维数值模拟,成功模拟出了分离区的出现、分离区的几何尺度、交汇区域的水位变化等现象。数值模拟结果与应用声速多普勒流速仪(ADV)测量的试验结果吻合较好。研究表明:在汇口下游主流右侧出现分离区,分离区流速较小甚至出现回流现象,分离区的形状随着入汇角的减小而变得狭长,分离区的尺寸随着入汇角度和汇流比的增大而增大。本模型不仅对排污口的设计、河道治理等具有重要指导作用,还可进一步用于研究交汇区域的污染物扩散。
The characteristics of separation zone and flow field of confluent rivers were studied in the paper by series of numerical simulations and flume experiments. The k-ε turbulence model and VOF method were used in simulations. The simulations were conducted in a combined flume with 90° and 60° angles between main and tributary flume and different discharge ratios. The results were examined by experiment, in which velocity field were measured by a three-component Acoustic Doppler velocimeter （ADV）. The results showed that the separation zone scales varied with the discharge ratios and angles between a main fiver and tributary. It would play an important guiding role on the design of sewage outfall and river training, and could be applied in the study of pollutants transportation
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2009年第3期320-325,共6页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金项目(50579043)
2006年教育部新世纪优秀人才支持计划(NCET-06-0792)
关键词
入汇型河道
分离区
数值模拟
声速多普勒流速仪
confluent river
separation zone
numerical simulation
Acoustic Doppler Velocimeter
