The Effect of Surface Roughness of a Body in the High Reynolds-Number Flow
In this paper, first, the principle, structures, operations, and performances of the cryogenic wind tunnel are described. By changing the pressure, temperature and velocity of gas a high Reynolds-number flow (5×104<Re<107) can be obtained. From the research results, a high Reynolds-number flow...
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| Format: | Article |
| Language: | English |
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Wiley
1995-01-01
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| Series: | International Journal of Rotating Machinery |
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| Online Access: | http://dx.doi.org/10.1155/S1023621X95000170 |
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| author | Tsutomu adachi |
| author_facet | Tsutomu adachi |
| author_sort | Tsutomu adachi |
| collection | DOAJ |
| description | In this paper, first, the principle, structures, operations, and performances of the cryogenic wind tunnel are described. By changing the pressure, temperature and velocity of gas a high Reynolds-number flow (5×104<Re<107) can be obtained. From the research results, a high Reynolds-number flow with comparatively low power, LN consumptions was attained. It was with Mach-number independent of each other, o show some examples of high Reynolds-number flow, the effects of surface roughness and grooves on the surface of a cylinder on the flow are measured using models with various values of roughness and size. A model test of an airship was also conducted. With the high Reynolds-number flow, the thickness of
the boundary layer becomes thinner. Then the surface conditions of a body have great effect on the flow phenomena and on the drag of the body. Some attempts to reduce the drag of the body were shown. |
| format | Article |
| id | doaj-art-fd78795e12204b8f95783918a57d050d |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 1995-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-fd78795e12204b8f95783918a57d050d2025-02-03T00:59:59ZengWileyInternational Journal of Rotating Machinery1023-621X1995-01-0121233210.1155/S1023621X95000170The Effect of Surface Roughness of a Body in the High Reynolds-Number FlowTsutomu adachi0Faculty of Engineering, Osaka Sangyo University, 3-1-1, Nakagaito, Daito, Osaka (574), JapanIn this paper, first, the principle, structures, operations, and performances of the cryogenic wind tunnel are described. By changing the pressure, temperature and velocity of gas a high Reynolds-number flow (5×104<Re<107) can be obtained. From the research results, a high Reynolds-number flow with comparatively low power, LN consumptions was attained. It was with Mach-number independent of each other, o show some examples of high Reynolds-number flow, the effects of surface roughness and grooves on the surface of a cylinder on the flow are measured using models with various values of roughness and size. A model test of an airship was also conducted. With the high Reynolds-number flow, the thickness of the boundary layer becomes thinner. Then the surface conditions of a body have great effect on the flow phenomena and on the drag of the body. Some attempts to reduce the drag of the body were shown.http://dx.doi.org/10.1155/S1023621X95000170High Reynolds numberSurface roughnessBoundry layerDragStrouhal number. |
| spellingShingle | Tsutomu adachi The Effect of Surface Roughness of a Body in the High Reynolds-Number Flow International Journal of Rotating Machinery High Reynolds number Surface roughness Boundry layer Drag Strouhal number. |
| title | The Effect of Surface Roughness of a Body in the High
Reynolds-Number Flow |
| title_full | The Effect of Surface Roughness of a Body in the High
Reynolds-Number Flow |
| title_fullStr | The Effect of Surface Roughness of a Body in the High
Reynolds-Number Flow |
| title_full_unstemmed | The Effect of Surface Roughness of a Body in the High
Reynolds-Number Flow |
| title_short | The Effect of Surface Roughness of a Body in the High
Reynolds-Number Flow |
| title_sort | effect of surface roughness of a body in the high reynolds number flow |
| topic | High Reynolds number Surface roughness Boundry layer Drag Strouhal number. |
| url | http://dx.doi.org/10.1155/S1023621X95000170 |
| work_keys_str_mv | AT tsutomuadachi theeffectofsurfaceroughnessofabodyinthehighreynoldsnumberflow AT tsutomuadachi effectofsurfaceroughnessofabodyinthehighreynoldsnumberflow |