摘要
本文采用CFD数值模拟的方法对二维光滑平板阻力进行计算,与经典理论公式比较,以验证CFD方法的可靠性。从已有的肋条减阻的实验结论出发,对带有肋条结构的平板与光滑平板的阻力进行CFD计算,经对比带肋条平板的阻力减小18.39%。分析数值模拟结果的速度场、涡量场等,初步得到肋条结构减阻的机理。肋条顶部产生的两个方向相反的旋涡,是实现减阻的主要原因。
CFD numerical simulation was adopted to calculate the drag coefficient of the 2D smooth plate,compared with the classic theories and formulas to verify the correctness and reliability of the CFD method.Based on the pre-existing experimental results,we made CFD contrast calculation between the smooth and ribleted plate,and the drag reduction is as large as 18.39%.The velocity field and vorticity field was analysed,and we could explore the drag reduction mechanism.A pair of reversed vortex formed at the tip of the riblet was the main reason that resulted in drag reduction.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第5期771-774,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点项目(No.50836006)
关键词
非光滑表面
湍流
减阻
数值模拟
non-smooth surface
turbulent flow
drag reduction
numerical simulation
