摘要
肋条相邻两个肋壁间夹角越小时对减阻效果具有加强作用。本文采用LES数值模拟的方法,在湍流状态下,分别对具有相同h和s的三角形肋条、梯形肋条和刀刃形肋条进行了模拟计算。研究肋条肋壁夹角不同时,对平板湍流减阻效果的影响,并通过分析平板中涡量和肋条沿展向局部摩擦力的分布规律,肋条随肋壁夹角减小而减阻变化的原因,探讨不同形状肋条之间的减阻机理。
It has been found that riblets with smaller angle between the sloping walls could enhance the performance of drag reduction. In this paper, Large-Eddy Simulations method(LES) is used to calculate the turbulent flow field of the triangular riblets, trapezoidal riblets and blade-shaped riblets with the same h and s. The effects of riblets with different riblet angles on turbulent drag reduction are studied. By analyzing the turbulent flow over a riblet-covered surface, vorticity field,the distribution of local friction along the spanwise and normal of riblet and the drag reduction mechanism of riblets with different riblet angles are discussed.
作者
康凯
王国付
耿孝恒
张子良
李新迪
张明明
王卫强
KANG-Kai;WANG Guo-Fu;GENG Xiao-Heng;ZHANG Zi-Liang;LI Xin-Di;ZHANG Ming-Ming;WANG Wei-Qiang(College of petroleum Engineering,Liaoning Shihua University,Fushun 113001,China;Binzhou College,Binzhou 256600,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;Institute of Science and Technology,China Three Gorges Corporation,Beijing 100038,China;Key Laboratory of Wind Energy Utilization,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Dalian National Laboratory For Clean energy,Chinese Academy of Sciences,Dalian 116023,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2022年第4期960-966,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点基金项目(No.51736008)
中国科学院洁净能源先导科技专项子课题(No.XDA 21050303)。
关键词
湍流减阻
肋壁夹角
大涡模拟
bionic riblet
riblet angles
large-eddy simulation
