教師資料查詢 | 類別: 期刊論文 | 教師: 盧博堅 LU PO-CHIEN (瀏覽個人網頁)

標題: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
語言英文
ISSN0253-3839
期刊性質國內
收錄於SCI;EI
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式紙本
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