Visualization of Flows in Curved Channels with a Moderate or High Rotation Speed
Flows in channels with streamwise curvature and spanwise rotation are visualized in terms of end-view near the exit of the test sections through injecting smoke into the flows. Two test sections are used, i.e. the rectangular channels with the aspect ratio of and 10, respectively. The work focuses o...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
1997-01-01
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| Series: | International Journal of Rotating Machinery |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1023621X97000201 |
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| _version_ | 1832562672439132160 |
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| author | Liqiu Wang K. C. Cheng |
| author_facet | Liqiu Wang K. C. Cheng |
| author_sort | Liqiu Wang |
| collection | DOAJ |
| description | Flows in channels with streamwise curvature and spanwise rotation are visualized in terms
of end-view near the exit of the test sections through injecting smoke into the flows. Two test
sections are used, i.e. the rectangular channels with the aspect ratio of and 10, respectively.
The work focuses on visualization of Dean and Coriolis vortices under the effects of secondary
instabilities and flows in the region with a relatively high rotation speed. The results
show that the secondary instabilities cause the Dean and Coriolis vortices oscillating in
various forms and the flows at high rotation speeds are controlled by the secondary instabilities
rather than the primary instability. In particular, the secondary instabilities lead the
flows to be unsteady and turbulent somewhat like the bursting flow in the turbulent boundary
layers. |
| format | Article |
| id | doaj-art-65c80d7a28724e8da693b243a4ec2fb3 |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 1997-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-65c80d7a28724e8da693b243a4ec2fb32025-02-03T01:22:09ZengWileyInternational Journal of Rotating Machinery1023-621X1997-01-013321523110.1155/S1023621X97000201Visualization of Flows in Curved Channels with a Moderate or High Rotation SpeedLiqiu Wang0K. C. Cheng1School of Mechanical & Production Engineering, Nanyang Technological University, Nanyang Avenue, 639798, SingaporeDepartment of Mechanical Engineering, University of Alberta, Edmonton T6G 2G8, CanadaFlows in channels with streamwise curvature and spanwise rotation are visualized in terms of end-view near the exit of the test sections through injecting smoke into the flows. Two test sections are used, i.e. the rectangular channels with the aspect ratio of and 10, respectively. The work focuses on visualization of Dean and Coriolis vortices under the effects of secondary instabilities and flows in the region with a relatively high rotation speed. The results show that the secondary instabilities cause the Dean and Coriolis vortices oscillating in various forms and the flows at high rotation speeds are controlled by the secondary instabilities rather than the primary instability. In particular, the secondary instabilities lead the flows to be unsteady and turbulent somewhat like the bursting flow in the turbulent boundary layers.http://dx.doi.org/10.1155/S1023621X97000201VisualizationRotating curved flowDean vorticesCoriolis vorticesSecondary instability. |
| spellingShingle | Liqiu Wang K. C. Cheng Visualization of Flows in Curved Channels with a Moderate or High Rotation Speed International Journal of Rotating Machinery Visualization Rotating curved flow Dean vortices Coriolis vortices Secondary instability. |
| title | Visualization of Flows in Curved Channels with a
Moderate or High Rotation Speed |
| title_full | Visualization of Flows in Curved Channels with a
Moderate or High Rotation Speed |
| title_fullStr | Visualization of Flows in Curved Channels with a
Moderate or High Rotation Speed |
| title_full_unstemmed | Visualization of Flows in Curved Channels with a
Moderate or High Rotation Speed |
| title_short | Visualization of Flows in Curved Channels with a
Moderate or High Rotation Speed |
| title_sort | visualization of flows in curved channels with a moderate or high rotation speed |
| topic | Visualization Rotating curved flow Dean vortices Coriolis vortices Secondary instability. |
| url | http://dx.doi.org/10.1155/S1023621X97000201 |
| work_keys_str_mv | AT liqiuwang visualizationofflowsincurvedchannelswithamoderateorhighrotationspeed AT kccheng visualizationofflowsincurvedchannelswithamoderateorhighrotationspeed |