Near Field Structure Analysis of Three Dimensional Laminar Swirling Flow

• Main Authors: Chih-Ming Yuan, 袁治明
• Other Authors: An-Ban Wang
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/09198402912791531868

碩士 === 國立臺灣大學 === 應用力學研究所 === 84 === A confined vortex flows created by tangential injection are widely used in numerous practical devices, such as cyclone separaror, Ranque-Hilsch tube, swirl combustor , etc. Although there have been hundreds references existed in the literature of the swirling flows, however , the behavior of swirling flow is still not well known, especially in the near flow filed. In this paper, the vortex was generated in a circular pipe by injecting water tangentially through two diametrically opposed feeder tubes at the outside edge of the tube. Flow- visualizations and LDA-measurements were used to experimentally investigated the flow. Results from Numerical calculations by a commercial package Flow3D were used to help understanding the detailed structure and flow mechanisms of the three-dimentional complex flow.