正弦波形壁面紊流临界分离流动特性的数值研究  

Numerical Study of Critical Separation Flow Characteristics of Turbulent Flow with Sinusoidal Walls

作　　者：余泽江 黄社华[1] YU Ze-jiang;HUANG She-hua(School of Water Resources and Hydropower Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水利水电学院,湖北武汉430072

出　　处：《水电能源科学》2024年第5期84-87,共4页Water Resources and Power

摘　　要：波形壁面对波纹管内流动的影响十分显著,其中流动分离对波纹管的流动阻力和传热特性有重要和本质的影响。针对波形比对产生流动分离的影响问题,采用SSTκ-ω紊流模型对不同波形比的正弦型波纹管内流动进行数值模拟,描述了波纹管流的流动特性,分析了波纹管波形比和雷诺数对流动分离的影响。结果表明,在不同波形比的波纹管流中均存在一个流动分离的临界雷诺数,当雷诺数小于临界雷诺数时,波纹管内不会发生流动分离现象;最后拟合得到流动分离临界雷诺数关于波形比的分布公式。研究结果可在一定程度上为波形壁面的工业设计提供参考。In corrugated pipes,the influence of the waveform wall on the flow is significant,where the presence of flow separation has an important and essential effect on the flow resistance and heat transfer characteristics of corrugated pipes.Addressing the effect of waveform ratio on the generation of flow separation,the SSTκ-ωturbulence model was used to numerically simulate the flow in a sinusoidal wavy-wall pipe flow and the flow characteristics ware described.Then the influence of the waveform ratio and Reynolds number on the generation of flow separation was analyzed.The results show that there exists a critical Reynolds number for flow separation in every wavy-wall pipe flow with different waveform ratios.When Reynolds number is smaller than the critical Reynolds number,the flow separation does not occur in the pipe.Finally,the critical Reynolds number distribution equation for the waveform ratio is obtained by curve fitting.

关 键 词：流动分离 波纹管 SSTκ-ω紊流模型 数值计算 

分 类 号：TV134[水利工程—水力学及河流动力学] O357.5[理学—流体力学]