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:Aerodynamics of a Vibrating Square Prism in Homogeneous Turbulent Flows
學年84
學期2
出版(發表)日期1996/05/01
作品名稱Aerodynamics of a Vibrating Square Prism in Homogeneous Turbulent Flows
作品名稱(其他語言)均勻紊流場中二維方柱受強制振動之氣動力研究
著者Lu, Po-chien; Chen, Rou-hwa; Cheng, Chi-ming; Huang, Jean-houng
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 19(3), pp.353-361
摘要A series of experiments have been conducted to investigate the mean drag coefficient (CD ), fluctuating drag coefficient (CD‘), fluctuating lift coefficient (CL‘), spanwise correlation, vorticity of the wake, wake velocity spectrum and lift spectrum of a square prism due to forced vibration normal to approaching turbulence flows. The frequencies and amplitudes of vibration, the turbulence intensities, and the length scales of flow fields have been controlled as the parameters of the experiments.
The results show that the wind coefficients are much greater when the oscillating cylinder is in the lock‐in range rather than stationary and reach peak value at the resonant frequency, while the wake vorticity attains maximum values.
High turbulence intensity will weaken the vortex shedding due to the effect of shear layer mixing, so the wake vorticity and wind coefficients, CD and CL’, respectively, and the peak values of the spectrum of velocity and lift force will be decreased, while, on the contrary, CD’ will increase. As the turbulence length scale increases, the vorticity of wake and wind coefficients will increase proportional to the oscillating amplitude.
關鍵字Forced oscillating;Lock-in;Homogeneous turbulent flows;強制振動;鎖定現象;均勻紊流場
語言英文
ISSN0253-3839
期刊性質國內
收錄於SCI
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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