English  |  正體中文  |  简体中文  |  Items with full text/Total items : 27005/38806
Visitors : 2402538      Online Users : 70
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/37579

Title: Cold-Flow Patterns and Mixing Index behind/near Rifled Bluff-Body Frustums
Authors: San, K. C;.Huang, Y. Z;.Yen, S. C.
Contributors: 國立台灣海洋大學:機械與機電工程學系
Date: 2013
Issue Date: 2016-03-23T07:49:24Z
Publisher: Journal of Visualization
Abstract: Rifled fillisters milled on cannular frustums were utilized to increase turbulence intensity (T.I.). Four configurations of unrifled, inner-rifled, outer-rifled, and two-faced rifled frustums were utilized to increase T.I. and mixing index (η). The mixing indices were calculated by measuring the concentrations of carbon dioxide (CCO2CCO2) and oxygen (CO2CO2) behind the pure-jet nozzle and bluff-body frustums. The riled helical fillisters intensify the interaction and mixing between central flow and annular-air flow. Flow characteristics behind the pure-jet nozzles and bluff-body frustums were analyzed by smoke-wire flow visualization, vortex-shedding anemometry, and gas analyzer. The smoke-streak flow patterns behind the pure-jet nozzle were characterized by jet-flow and vortex-shedding patterns. Three flow patterns of jet-flow, recirculation-flow, and turbulent-flow were characterized behind the bluff-body frustums. The experimental results showed that Strouhal number (St) increases with T.I., and high central-jet Reynolds number (Re c) induces a low St. The ηCO2ηCO2 increases with T.I. and the maximum ηCO2ηCO2of 64 % occurs behind the two-faced rifled frustum when T.I. = 4.5 %. The ηO2ηO2increases with T.I., and ηO2ηO2 has maximum of 98 % occurring behind the two-faced rifled frustum when T.I. = 3.5 %.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/37579
Appears in Collections:[機械與機電工程學系] 期刊論文

Files in This Item:

File Description SizeFormat
art%3A10.1007%2Fs12650-013-0168-z.pdf895KbAdobe PDF80View/Open


All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback