Separated Shear Layers of Rectangular Prisms in Turbulent Flows
學年 92
學期 1
出版(發表)日期 2003-09-01
作品名稱 Separated Shear Layers of Rectangular Prisms in Turbulent Flows
作品名稱(其他語言)
著者 Lu, Po-chien; Cheng, Chii-ming; Lai, Chien‐wan; Chang, Chang‐wei
單位 淡江大學水資源及環境工程學系; 淡江大學土木工程學系
出版者 Taipei : Chinese Institute of Chemical Engineers
著錄名稱、卷期、頁數 Journal of the Chinese Institute of Engineers=中國工程學刊 26(5), pp.721-727
摘要 Rectangular prisms with different depth-to-width ratios (B/D) were placed in flow fields with various turbulence intensities (T.I.) and length scales to study the unsteady structures of separated shear layers. Velocity profiles, turbulence intensity profiles, velocity gradient profiles, and wake spectra of the prisms were measured. When B/D=.4 to 1., differences between the acceleration and deceleration phases of these profiles were prominent, indicating strong vorticities especially when B/D= .6. These differences, also supported by the spectra peaks, became less obvious when B/D=2. and 3.. The approaching field T.I. had a larger effect than the length scale. Higher T.I. led to increased intensity, flow mixing, and thickness of the boundary layer, but weaker wake vorticity.
關鍵字 separated shear layer;turbulence intensity;turbulence length scale;phase average
語言 en
ISSN 0253-3839
期刊性質 國內
收錄於 SCI EI
產學合作
通訊作者
審稿制度
國別 TWN
公開徵稿
出版型式 紙本
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