Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in Rotating Rectangular Ducts
Experiments were conducted to investigate the effects of rotation and aspect ratio on the convective heat transfer of radially outward air flows in rotating rectangular ducts with a uniform wall heat flux by using fiberglass duct walls lined with separated film heaters. The duct hydraulic diameter,...
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| Format: | Article |
| Language: | English |
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Wiley
1994-01-01
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| Series: | International Journal of Rotating Machinery |
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| Online Access: | http://dx.doi.org/10.1155/S1023621X94000023 |
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| _version_ | 1849693423736455168 |
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| author | C. R. Kuo G. J. Hwang |
| author_facet | C. R. Kuo G. J. Hwang |
| author_sort | C. R. Kuo |
| collection | DOAJ |
| description | Experiments were conducted to investigate the effects of rotation and aspect ratio on the convective heat transfer of radially
outward air flows in rotating rectangular ducts with a uniform wall heat flux by using fiberglass duct walls lined with
separated film heaters. The duct hydraulic diameter, heater active length, and mean rotation radius were 4, 120, and 180 mm,
respectively. Ranges of parameters were through-flow Reynolds number, 1,000–15,000; rotation number, 0–0.32; rotational
buoyancy parameter, 0–1.2; and cross-sectional aspect ratio, 0.5, 1.0, and 2.0. The results showed that the higher the rotation
number, the greater the enhancement ofthe heat transfer rate especially at the pressure side. The rotational buoyancy parameter
decreases the heat transfer for low Re but enhances the heat transfer for high Re. The largest heat transfer enhancement is
seen for AR = 1.0, and the enhancement for AR = 0.5 is greater than that for AR = 2.0. |
| format | Article |
| id | doaj-art-2c76a3bce07d4d59a4e850283d249cdd |
| institution | DOAJ |
| issn | 1023-621X |
| language | English |
| publishDate | 1994-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-2c76a3bce07d4d59a4e850283d249cdd2025-08-20T03:20:25ZengWileyInternational Journal of Rotating Machinery1023-621X1994-01-011111810.1155/S1023621X94000023Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in Rotating Rectangular DuctsC. R. Kuo0G. J. Hwang1Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, TaiwanDepartment of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, TaiwanExperiments were conducted to investigate the effects of rotation and aspect ratio on the convective heat transfer of radially outward air flows in rotating rectangular ducts with a uniform wall heat flux by using fiberglass duct walls lined with separated film heaters. The duct hydraulic diameter, heater active length, and mean rotation radius were 4, 120, and 180 mm, respectively. Ranges of parameters were through-flow Reynolds number, 1,000–15,000; rotation number, 0–0.32; rotational buoyancy parameter, 0–1.2; and cross-sectional aspect ratio, 0.5, 1.0, and 2.0. The results showed that the higher the rotation number, the greater the enhancement ofthe heat transfer rate especially at the pressure side. The rotational buoyancy parameter decreases the heat transfer for low Re but enhances the heat transfer for high Re. The largest heat transfer enhancement is seen for AR = 1.0, and the enhancement for AR = 0.5 is greater than that for AR = 2.0.http://dx.doi.org/10.1155/S1023621X94000023Aspect ratioconvective heat transferrotating ductCoriolis forcecentrifugal-buoyancy brceradially outwardflow. |
| spellingShingle | C. R. Kuo G. J. Hwang Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in Rotating Rectangular Ducts International Journal of Rotating Machinery Aspect ratio convective heat transfer rotating duct Coriolis force centrifugal-buoyancy brce radially outwardflow. |
| title | Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in
Rotating Rectangular Ducts |
| title_full | Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in
Rotating Rectangular Ducts |
| title_fullStr | Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in
Rotating Rectangular Ducts |
| title_full_unstemmed | Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in
Rotating Rectangular Ducts |
| title_short | Aspect Ratio Effect on Convective Heat Transfer of Radially Outward Flow in
Rotating Rectangular Ducts |
| title_sort | aspect ratio effect on convective heat transfer of radially outward flow in rotating rectangular ducts |
| topic | Aspect ratio convective heat transfer rotating duct Coriolis force centrifugal-buoyancy brce radially outwardflow. |
| url | http://dx.doi.org/10.1155/S1023621X94000023 |
| work_keys_str_mv | AT crkuo aspectratioeffectonconvectiveheattransferofradiallyoutwardflowinrotatingrectangularducts AT gjhwang aspectratioeffectonconvectiveheattransferofradiallyoutwardflowinrotatingrectangularducts |