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为探究植被对多孔射流运动特性的影响，采用Realizable κ-ε湍流模型，分别从流速分布、旋涡形态及射流轨迹等方面分析了射流—横流流速比和射流间距对植被化河道中串联排列多孔动量射流运动特性的影响规律。结果表明，植被抑制射流的展向扩展并促进垂向扩展；低流速比时前侧射流抑制后侧射流的垂向扩散，高流速比时前侧射流对后侧射流的遮挡效应明显使得后侧射流能够扩散至更高的位置。研究结果可为植被化河道中污水排放设计与优化提供理论依据。
Abstract：To investigate the impact of vegetation on the motion characteristics of porous jet flow, the Realizable κ-ε turbulence model was adopted to analyze the influence laws of the jet-cross-flow velocity ratio and jet spacing on the motion characteristics of the momentum jets arranged in series in vegetated river channels from the aspects of flow velocity distribution, vortex morphology and jet trajectory, respectively. The results show that vegetation inhibits the horizontal expansion of the jets and promotes their vertical spread. At low jet-to-crossflow velocity ratios, the front jet suppresses the vertical diffusion of the rear jet, while at high jet-to-crossflow velocity ratios, the shading effect of the front jet on the rear jet is significant, allowing the rear jet to diffuse to higher positions. This study can provide theoretical guidance for the design and optimization of wastewater discharge in vegetated channels.
[1] MOSSA M,BEN MEFTAH M,DE SERIO F,et al.How vegetation in flows modifies the turbulent mixing and spreading of jets[J].Scientific reports,2017,7:6587.
[2] BEN MEFTAH M,DE SERIO F,MALCANGIO D,et al.Experimental study of a vertical jet in a vegetated crossflow[J].Journal of environmental management,2015,164:19-31.
[3] GAO M,HUAI W X,XIAO Y Z,et al.Large eddy simulation of a vertical buoyant jet in a vegetated channel[J].International journal of heat and fluid flow,2018,70:114-124.
[4] YU D,ALI M S,LEE J H W.Multiple tandem jets in cross-flow[J].Journal of hydraulic engineering,2006,132(9):971-982.
[5] 李志伟，槐文信，钱忠东.横流中单排多孔射流的流场与浓度特性数值模拟[J].中国科学(技术科学),2012,42(12):1395-1406.(LI Z W,HUAI W X,QIAN Z D.Numerical simulation of flow field and concentration characteristics of single row porous jet in cross flow[J].Scientia sinica (technologica),2012,42(12):1395-1406.(in Chinese))
[6] 李少华，袁斌，刘利献，等.多孔横向紊动射流涡量场的数值分析[J].中国电机工程学报，2007,27(23):100-104.(LI S H,YUAN B,LIU L X,et al.Numerical investigation on the vortices of multiple turbulent jet in crossflow[J].Proceedings of the CSEE,2007,27(23):100-104.(in Chinese))
[7] SHIH T H,LIOU W W,SHABBIR A,et al.A new κ-ε eddy viscosity model for high Reynolds number turbulent flows[J].Computers & fluids,1995,24(3):227-238.
[8] XIAO Y,TANG H W,LIANG D F,et al.Numerical study of hydrodynamics of multiple tandem jets in cross flow[J].Journal of hydrodynamics,ser B,2011,23(6):806-813.
[9] XIAO Y Z,HUAI W X,GAO M,et al.Evaluating the hydrodynamics of a round jet in a vegetated crossflow through large eddy simulation[J].Environmental fluid mechanics,2019,19(1):181-201.
基本信息:
DOI：10.20040/j.cnki.1000-7709.2026.20250135
中图分类号:TV133
引用信息:
[1]汪旭,夏春华,张宗江,等.植被化河道底部多孔动量射流运动特性数值研究[J].水电能源科学,2026,44(01):67-72.DOI:10.20040/j.cnki.1000-7709.2026.20250135.
基金信息:
重庆市教育委员会科学技术研究项目(KJQN202400705); 重庆市自然科学基金面上项目(CSTB2024NSCQ-MSX0824)
2025-01-18
2025
2025-03-24
2025
1
2025-12-24
2025-12-24
2025-12-24