會議論文
| 學年 | 90 |
|---|---|
| 學期 | 1 |
| 發表日期 | 2002-12-20 |
| 作品名稱 | Flow Structures and Heat Transfer Characteristics in Fan Flows withRectangular-Plate Turbulators |
| 作品名稱（其他語言） | |
| 著者 | Chen, Yen-Hung; Chen, T. Y. |
| 作品所屬單位 | 淡江大學航空太空工程學系 |
| 出版者 | |
| 會議名稱 | 第二十六屆中華民國力學學會年會暨全國力學會議 |
| 會議地點 | |
| 摘要 | The flow structures and heat transfer characteristics in fan flows without and with a 90o rectangular-plate turbulator mounted, separately, on the bottom and top walls of a duct were experimentally investigated. The plate to duct height ratio was fixed at 0.429. Eight heated plates, placed along the bottom wall of the duct, were used as the heat transfer surfaces. The studies included three-component mean and fluctuating velocity measurements at duct cross-sections and near the heat transfer surfaces using laser Doppler velocimetry. The near-wall axial vorticities, turbulent kinetic energy and axial mean velocities were obtained from the measured velocity data. The temperatures on the heat transfer surfaces were measured using thermocouples to obtain the Stanton numbers. Results show that both the top-wall and bottom-wall rectangular-plate turbulators in fan flows have the effect to augment the heat transfer and to cause increases in the near-wall axial vorticity, turbulent kinetic energy and averaged axial mean velocity. The strength of the secondary flow (axial vorticity) and the convective effect (axial mean velocity) are the main fluid dynamic factors affecting the heat transfer distribution for the fan flows across the bottom- wall and top-wall rectangular-plate turbulators, respectively. |
| 關鍵字 | Fan flow;Turbulator;Vorticity;Turbulent kinetic energy;Heat transfer |
| 語言 | en |
| 收錄於 | |
| 會議性質 | |
| 校內研討會地點 | |
| 研討會時間 | 20021220~20021221 |
| 通訊作者 | 中華民國力學學會 |
| 國別 | |
| 公開徵稿 | Y |
| 出版型式 | |
| 出處 | 第二十六屆中華民國力學學會年會暨全國力學會議論文集, pp.12p. |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/84758 ) |