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NACA-TN-2974
Experiments on mixed-free-and-forced-convective heat transfer connected with turbulent flow through a short tube
Year: 1953
Abstract: Experiments were conducted to obtain information on heat transfer in turbulent, mixed-free- and -forced-convection flow. This flow regime has recently become important in connection with certain engineering applications such as gas turbines and jet engines. The investigation was made in a vertical tube with a length-to-diameter ratio equal to 5. The walls of the tube were heated, and air was conducted through the tube in either an upward or a downward direction. Free convection is created by gravity so that the buoyancy forces in the heated layers near the tube wall were either parallel or opposite to the direction of the forced flow. The Grashof number which characterizes the free-convection effect could be varied between approximately 109 and 1013 and the Reynolds number characterizing the forced flow varied from 36x103 to 377x103.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:12:29Z | |
| date available | 2017-09-04T17:12:29Z | |
| date copyright | 01/01/1953 | |
| date issued | 1953 | |
| identifier other | YVONEEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/136008 | |
| description abstract | Experiments were conducted to obtain information on heat transfer in turbulent, mixed-free- and -forced-convection flow. This flow regime has recently become important in connection with certain engineering applications such as gas turbines and jet engines. The investigation was made in a vertical tube with a length-to-diameter ratio equal to 5. The walls of the tube were heated, and air was conducted through the tube in either an upward or a downward direction. Free convection is created by gravity so that the buoyancy forces in the heated layers near the tube wall were either parallel or opposite to the direction of the forced flow. The Grashof number which characterizes the free-convection effect could be varied between approximately 109 and 1013 and the Reynolds number characterizing the forced flow varied from 36x103 to 377x103. | |
| language | English | |
| title | NACA-TN-2974 | num |
| title | Experiments on mixed-free-and-forced-convective heat transfer connected with turbulent flow through a short tube | en |
| type | standard | |
| page | 60 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1953 | |
| contenttype | fulltext |