期刊論文
| 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 | 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 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44891 ) |