水利学报2024，Vol.55Issue(7)：827-837,11.DOI:10.13243/j.cnki.slxb.20240167
大型岔管内螺旋流涡带数值分析研究
Numerical analysis of the spiral vortex ropes within a large bifurcated pipe
摘要
Abstract
Bifurcated pipes are widely used in critical fields such as hydropower stations,pumped storage power stations,and other important industries.The coupling of bifurcation shape,rib structure,and flow pattern in large-scale bifurcated pipes(main pipe diameter of more than 6 meters)leads to the undesired spiral vortex ropes,which contributes to the increase of non-negligible hydraulic losses of the bifurcated pipe.The spiral flow pattern near the rib in the bifurcated pipe was effectively eliminated by the implementation of guide vanes,which was based on the establishment of the numerical calculation model for the complex flow pattern of large-scale bifurcated pipes in the present paper.The validity and accuracy of the numerical results were verified by comparing it with experimental data.Specifically,for different flow cases in branch pipe,the optimized flow of the main pipe is smooth,and the maximum flow velocity is located near the bend of the branch pipe.The vortex flow patterns on both sides of the bi-furcation rib and spiral flow phenomenon in the branch pipe have essentially eliminated after optimization.For the 3-unit double-side and 2-unit single-side operating cases,only a small amount of rib plate flow is formed due to the non-uniform flow rates in the two branches.It has been proven that the optimized scheme of multi-guide vanes can effectively mitigate and eliminate the occurrence of spiral flow,while also reducing hydraulic losses of the bifur-cated pipe.The results can give some reference for hydraulic design of bifurcated pipes and related research fields.关键词
计算流体力学/螺旋流涡带/导流叶片/水力损失/水力优化/数值研究/大型岔管Key words
computational fluid dynamics/spiral vortex ropes/guide vanes/hydraulic loss/hydraulic optimiza-tion/numerical analysis/large bifurcated pipe分类
建筑与水利引用本文复制引用
申艳,姜姿云,杨利,宋蕊香,王薇,郭苗..大型岔管内螺旋流涡带数值分析研究[J].水利学报,2024,55(7):827-837,11.基金项目
国家自然科学基金面上项目(52279084) （52279084）
国家自然科学基金青年基金项目(51909132,52206048) （51909132,52206048）
中央高校基金项目(2024MS065) （2024MS065）
