Refinement of turbulent flow velocity characteristics
The basic laws of Prandtl semi-empirical turbulence theory were analyzed in the article. It was shown, that the Prandtl – Nikuradse logarithmic distribution of velocities are not strictly universal. The change of the first and second turbulence constants was analyzed on the basis of experimental dat...
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2013-10-01
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| Series: | Инженерно-строительный журнал |
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| Online Access: | http://engstroy.spb.ru/index_2013_06/bryanskaya.pdf |
| _version_ | 1818390263328931840 |
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| author | Y.V. Bryanskaya |
| author_facet | Y.V. Bryanskaya |
| author_sort | Y.V. Bryanskaya |
| collection | DOAJ |
| description | The basic laws of Prandtl semi-empirical turbulence theory were analyzed in the article. It was shown, that the Prandtl – Nikuradse logarithmic distribution of velocities are not strictly universal. The change of the first and second turbulence constants was analyzed on the basis of experimental data of I. Nikuradse. The logarithmic velocity profiles for smooth and rough pipes have been transformed. A united velocity logarithmic profile for flows in pipes, appropriate for any rate of hydraulic resistance was received. A more precise, consistent with the resistance laws, description of the kinematic structure of the flow with varying parameters of the velocity profiles was set. It was shown that the position of the average velocity point for the flow in pipe remained constant when the parameters of the velocity profile changed. |
| first_indexed | 2024-12-14T04:54:51Z |
| format | Article |
| id | doaj.art-088a77d638344fa1bf118a07144169c2 |
| institution | Directory Open Access Journal |
| issn | 2071-4726 2071-0305 |
| language | English |
| last_indexed | 2024-12-14T04:54:51Z |
| publishDate | 2013-10-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-088a77d638344fa1bf118a07144169c22022-12-21T23:16:25ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-47262071-03052013-10-01416313810.5862/MCE.41.4Refinement of turbulent flow velocity characteristicsY.V. BryanskayaThe basic laws of Prandtl semi-empirical turbulence theory were analyzed in the article. It was shown, that the Prandtl – Nikuradse logarithmic distribution of velocities are not strictly universal. The change of the first and second turbulence constants was analyzed on the basis of experimental data of I. Nikuradse. The logarithmic velocity profiles for smooth and rough pipes have been transformed. A united velocity logarithmic profile for flows in pipes, appropriate for any rate of hydraulic resistance was received. A more precise, consistent with the resistance laws, description of the kinematic structure of the flow with varying parameters of the velocity profiles was set. It was shown that the position of the average velocity point for the flow in pipe remained constant when the parameters of the velocity profile changed.http://engstroy.spb.ru/index_2013_06/bryanskaya.pdfflow in pipestheory of turbulencevelocity profilevon Karman parameterhydraulic resistance |
| spellingShingle | Y.V. Bryanskaya Refinement of turbulent flow velocity characteristics Инженерно-строительный журнал flow in pipes theory of turbulence velocity profile von Karman parameter hydraulic resistance |
| title | Refinement of turbulent flow velocity characteristics |
| title_full | Refinement of turbulent flow velocity characteristics |
| title_fullStr | Refinement of turbulent flow velocity characteristics |
| title_full_unstemmed | Refinement of turbulent flow velocity characteristics |
| title_short | Refinement of turbulent flow velocity characteristics |
| title_sort | refinement of turbulent flow velocity characteristics |
| topic | flow in pipes theory of turbulence velocity profile von Karman parameter hydraulic resistance |
| url | http://engstroy.spb.ru/index_2013_06/bryanskaya.pdf |
| work_keys_str_mv | AT yvbryanskaya refinementofturbulentflowvelocitycharacteristics |