Flow structures and heat transfer characteristics in fan flows with and without delta-wing vortex generators
學年 92
學期 2
出版（發表）日期 2004-03-01
作品名稱 Flow structures and heat transfer characteristics in fan flows with and without delta-wing vortex generators
作品名稱（其他語言）
著者 Chen, Tseng-Yuan; Shu, H. T.
單位 淡江大學航空太空工程學系
出版者 Philadelphia: Elsevier Inc.
著錄名稱、卷期、頁數 Experimental Thermal and Fluid Science 28(4), pp.273-282
摘要 Effects of an external delta-wing vortex generator on the flow and heat transfer characteristics in fan flows and uniform flows were experimentally investigated and compared. A heated plate, installed on the bottom wall of a duct, was used as the heat transfer surface. Three-component mean and fluctuating velocity measurements were conducted using a laser Doppler velocimetry to characterize the flow structures and to obtain the near-wall flow parameters, including the axial mean velocity, axial vorticity and turbulent kinetic energy. Temperatures on the heat transfer surface were measured using thermocouples to obtain the Nusselt numbers. Results show that the external delta-wing vortex generator in fan flows has little overall effect on the near-wall averaged axial mean velocity and axial vorticity, but increases the turbulent kinetic energy, in the investigated X/D ranges. The increase in the turbulent kinetic energy by the delta-wing has little effect on heat transfer in the inherently vortical fan flows. Consequently, the delta-wing vortex generator in fan flows has little effect on the heat transfer augmentation.
關鍵字 Aerodynamics; Ducts; Fans; Heat transfer; Kinetic energy; Laser Doppler velocimeters; Turbulence; Velocity measurement; Wings; Fan flow; Uniform flow; Vortex flow; delta wing; heat transfer; kinetics; laser Doppler velocimeter; turbulence; velocimetry; vortex generator
語言 en
ISSN 0894-1777
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 Chen, T.Y.
審稿制度
國別 USA
公開徵稿
出版型式 紙本
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