English  |  正體中文  |  简体中文  |  Items with full text/Total items : 62797/95867 (66%)
Visitors : 3730065      Online Users : 657
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/44892


    Title: Vortex Shedding from Fixed and Oscillating Rectangular Prisms in Shear Flows
    Other Titles: 剪力流中矩柱之渦散現象研究
    Authors: Lu, Po-chien;Cheng, Chi-ming;Liang, Horng-sheng
    Contributors: 淡江大學水資源及環境工程學系;淡江大學土木工程學系
    Keywords: Vortex shedding;Shear flow;Wake cell boundary;渦散;剪力流;格元分界
    Date: 1997-09
    Issue Date: 2013-07-11 12:00:42 (UTC+8)
    Publisher: Taipei : Chinese Institute of Chemical Engineers
    Abstract: The main focus of this paper is to study the results of experiments on six different rectangular prisms with varied side ratios, with and without forced oscillation, displaced in two shear free streams and one uniform flow. The setting of free stream shear parameters f3=dU!dyxD/Uc are .24 and .32. With respect to vortex shedding phenomena, a comparison between shear flows and uniform flows is also part of the focus. Experimental results indicate that disturbance on the twodimensional vortex shedding of the uniform flow is caused by the longitudinal vortex of the shear flow gradient. As a result, a spanwise distribution of cells among the vortex shedding frequencies is created. Increases in the side ratios of the rectangular prisms can cause a shifting of cell boundaries toward the high-speed end. As shear parameters for the same prism increase, the cell boundaries move toward the lowspeed end. During oscillation, differences arise between the vorticity structures of cells, and the vortices of each cell are more unified, with improvements in correlation.
    Relation: Journal of the Chinese Institute of Engineers=中國工程學刊 20(5), pp.501-509
    DOI: 10.1080/02533839.1997.9741857
    Appears in Collections:[Graduate Institute & Department of Civil Engineering] Journal Article
    [Graduate Institute & Department of Water Resources and Environmental Engineering] Journal Article

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML448View/Open
    index.html0KbHTML34View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback