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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Xie, Junling Liu, Liping |
| Copyright Year | 2011 |
| Abstract | The numerical study proposed is to investigate the effectiveness of delta-winglet vortex generators (VGs) used for heat-transfer enhancement in a horizontal rectangular channel as a typical air passage for fin-and-tube heat exchangers. The effects of four different configurations of vortex generators have been investigated: (1) single pair VGs with a 30 degree attack angle; (2) 2-pair VG array with a 30 degree attack angle; (3) single pair VGs with a 45 attack angle; (4) 2-pair VG array with a 45 attack angle. The numerical results indicate that average Nusselt number increase is 31%–38% and 51%–71% for the channel mounted with VGs with a 30 degree attack angle and a 45 degree attack angle, respectively. The enhancement for single large pair of VGs is higher than that for a V-formation array with 2 small pairs. However, VGs also introduce extra pressure drop penalties to the channel flow, and higher heat-transfer performance is also accompanied by a larger pressure drop penalty. According to the results, a single large pair of VGs with 45 attack angle shows the best overall performance among all the configurations investigated. |
| Starting Page | 81 |
| Ending Page | 88 |
| Page Count | 8 |
| File Format | |
| ISBN | 9780791854969 |
| DOI | 10.1115/IMECE2011-65862 |
| Volume Number | Volume 10: Heat and Mass Transport Processes, Parts A and B |
| Conference Proceedings | ASME 2011 International Mechanical Engineering Congress and Exposition |
| Language | English |
| Publisher Date | 2011-11-11 |
| Publisher Place | Denver, Colorado, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Generators Heat exchangers Channel flow Pressure drop Heat transfer Vortices |
| Content Type | Text |
| Resource Type | Article |
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