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Hydraulic characteristics of turbulent flows inside pipes and broad channels
In the article, the authors provide their summarized findings concerning the difference between the mean velocity determined on the basis of the discharge rate and through the integration of the velocity profi le alongside the pipe radius. The authors have identified the ratio between these velocities, which is confirmed by the experimental data obtained for pipes and channels. The equation characterizing the ratio of these velocities has also been derived. The analysis of compatibility of dynamic and kinematic characteristics of in-pipe and wide flows has been performed. This analysis demonstrates that the coefficient of hydraulic resistance of in-pipe and wide flows can vary up to 10-20 % despite the identical hydraulic radius and the tension of friction. This difference is caused by the difference in the mean velocities of in-pipe flows. The authors demonstrate that the coincidence between the equations of hydraulic resistance of in-pipe and wide flows is attainable when the numerical exponent of the velocity profile inside pipes and channels is different. The quantitative correlation between the hydraulic resistance coefficient and the numerical exponent of the velocity profile for channel flows is identified. This correlation is substantiated by the experimental data.
Hydraulic characteristics of turbulent flows inside pipes and broad channels
In the article, the authors provide their summarized findings concerning the difference between the mean velocity determined on the basis of the discharge rate and through the integration of the velocity profi le alongside the pipe radius. The authors have identified the ratio between these velocities, which is confirmed by the experimental data obtained for pipes and channels. The equation characterizing the ratio of these velocities has also been derived. The analysis of compatibility of dynamic and kinematic characteristics of in-pipe and wide flows has been performed. This analysis demonstrates that the coefficient of hydraulic resistance of in-pipe and wide flows can vary up to 10-20 % despite the identical hydraulic radius and the tension of friction. This difference is caused by the difference in the mean velocities of in-pipe flows. The authors demonstrate that the coincidence between the equations of hydraulic resistance of in-pipe and wide flows is attainable when the numerical exponent of the velocity profile inside pipes and channels is different. The quantitative correlation between the hydraulic resistance coefficient and the numerical exponent of the velocity profile for channel flows is identified. This correlation is substantiated by the experimental data.
Hydraulic characteristics of turbulent flows inside pipes and broad channels
Baykov Vitaliy Nikolaevich (author) / Bryanskaya Yuliya Vadimovna (author) / Volynov Mikhail Anatolevich (author)
2012
Article (Journal)
Electronic Resource
Unknown
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