凹坑表面减阻技术数值研究  

Numerical Study on Drag Reduction Technology of Dimple Surface

作　　者：刘霞 王国付[1] 曹慧晶 LIU Xia;WANG Guo-fu;CAO Hui-jing(Liaoning Shihua University,Fushun Liaoning 113001,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001 [2]中国科学院工程热物理研究所,北京100190 [3]中国科学院大学,北京100190

出　　处：《当代化工》2023年第1期167-171,共5页Contemporary Chemical Industry

基　　金：辽宁省博士科研启动基金计划项目(项目编号:2020-BS-227);辽宁省自然科学基金计划项目(项目编号:2019-ZD-0060)。

摘　　要：基于RNG k-ε模型,通过数值模拟对非光滑凹坑表面的减阻特性进行研究。对不同凹坑间距D的凹坑表面开展研究,通过对凹坑的局部阻力、平均速度场及展向涡量等参数进行分析,研究了不同凹坑间距对减阻效果的影响;并通过分析平板中涡量和凹坑沿展向局部摩擦力的分布规律,探究凹坑间距不同减阻率变化的原因,揭示凹坑结构的减阻机理。结果表明:当凹坑间距D=0.4 mm时减阻效果最好,最大减阻率可达22.53%。Based on the RNG k-εmodel,the numerical simulation was carried out to study the drag reduction characteristics of the non-smooth dimple surface.By analyzing the parameters of the local resistance,average velocity field and spanwise vorticity of the pits,the influence of different dimple spacing D on the drag reduction effect was studied.Specifically,by analyzing the distribution of the vorticity and the local friction along the span direction for the flat plate and non-smooth dimple structure,the reason for the change of the drag reduction rate for different pit spacing was explored and the drag reduction mechanism of the non-smooth dimple structure was revealed.The results showed that the drag reduction effect was the most significant when the dimple spacing D was 0.4 mm,and the maximum drag reduction rate reached 22.53%.

关 键 词：湍流边界层 非光滑表面 凹坑减阻 数值模拟 

分 类 号：TE973.1[石油与天然气工程—石油机械设备]