肖勇, 金忠青. 固壁紊流流速分布指数型公式和阻力规律——(Ⅱ)过渡区[J]. 水科学进展, 1999, 10(1): 64-68.
引用本文: 肖勇, 金忠青. 固壁紊流流速分布指数型公式和阻力规律——(Ⅱ)过渡区[J]. 水科学进展, 1999, 10(1): 64-68.
Xiao Yong, Jin Zhongqing. Power-Type Velocity Distribution Formula and Skin-Friction Laws for Wall Turbulence:(Ⅱ) Hydraulic Transition Rough Region[J]. Advances in Water Science, 1999, 10(1): 64-68.
Citation: Xiao Yong, Jin Zhongqing. Power-Type Velocity Distribution Formula and Skin-Friction Laws for Wall Turbulence:(Ⅱ) Hydraulic Transition Rough Region[J]. Advances in Water Science, 1999, 10(1): 64-68.

固壁紊流流速分布指数型公式和阻力规律——(Ⅱ)过渡区

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

  • 摘要: 基于相似理论中的不完全自相似假设,研究了固壁紊流流速分布的结构型式。通过对壁面紊流结构的分析,进而给出了固壁紊流包括光滑区、过渡区和粗糙区在内的统一的指数型流速分布公式和阻力规律,并用尼库拉兹的实验资料作了验证。

     

    Abstract: Based on a new incomplete simiarity assumption of the simiarity theory and the structure of the asymmetric passing flows, a generalized power-type velocity distribution formula is proposed for hydraulic smooth region, hydraulic transition rough region and hydraulic rough region wallturbulence. Corresponding to the generalized velocity distribution formula, a skin-friction law is derived. Both the velocity distribution formula and the skin-friction law are compared with the classic Nikuradre experimental data.

     

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