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:The Effects of Turbulence on Mean Flow Past Fixed and Oscillating Rectangular Prisms
學年86
學期1
出版(發表)日期1997/11/01
作品名稱The Effects of Turbulence on Mean Flow Past Fixed and Oscillating Rectangular Prisms
作品名稱(其他語言)紊流場中振動矩柱之尾跡現象研究
著者Lu, Po-chien; Cheng, Chii-meng; Kao, Chung-ren
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 20(6), pp.615-622
摘要The characteristics of vortex wakes of rectangular prisms, with and wihtout forced osicllation, were experimentally investigated, as placed in different uniform turbulent flows. The experimental parameters were the turbulence intensities and length scales of the uniform turbulent flows and the depth-to-width ratios and vibrating frequencies, with fixed amplitudes, of the rectangular prisms. Measurements were taken on the lateral pressure and base pressure of the prisms, the point velocity in the wake, and the phase angle between lateral pressure and body displacement. The pressure coefficients (-CP, -Cpb• Cp', C~b) are much greater when the oscillating cylinder is in lock-in range and reach peak values at resonant frequencies in a uniform flow. High turbulence intensity weakens the vortex shedding, thereby decreasing the pressure coefficients and peak values of the spectra. Increasing the turbulent length scale causes the pressure coefficients to increase. The critical depthto- width ratio is found at HID=.6, while decreasing in this ratio results owing to increases in turbulence intensities.
關鍵字Forced oscillating;Vortex shedding;Uniform turbulent flow;Wind tunnel testing;強制振動;渦散;均勻紊流;風洞測試
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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