教師資料查詢 | 類別: 會議論文 | 教師: 陳增源 CHEN TSENG-YUAN (瀏覽個人網頁)

標題:Flow Structures and Heat Transfer Characteristics in Fan Flows withRectangular-Plate Turbulators
學年91
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26屆中華民國力學學會年會暨全國力學會議
會議地點臺北市, 臺灣
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
語言英文
收錄於
會議性質國內
校內研討會地點
研討會時間20021220~20021221
通訊作者
國別中華民國
公開徵稿Y
出版型式紙本
出處第26屆中華民國力學學會年會暨全國力學會議論文集12頁
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