固壁紊流流速分布指数型公式和阻力规律——(Ⅰ)粗糙区

Power Type Velocity Distribution Formula and Skin Friction Laws for Wall Turbulence: (Ⅰ) Hydraulic Rough Region

摘要: 基于相似理论中的不完全自相似假设,研究了粗糙区紊流流速分布的结构形式,通过对尼库拉兹粗糙管水流试验资料的分析,进而给出了粗糙区紊流新的指数型流速分布公式,在此基础上,探讨了管道和明渠的阻力规律。

Abstract: Based on a new incomplete simiarity assumption of the simiarity theory and the classic Nikuradere experimental data,a power-type velocity distribution formula is proposed for turbulent flow in hydraulic rough region.Corresponding to the new formula,skin-friction laws for turbulent flow in hydraulic rough region in open channels and pipes are presented.