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Numerical Investigation on Mixing Behavior of Co-Axial Jets Excited by Triangular Tabs(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2015年02期
Page:
27-
Research Field:
能源与机械工程
Publishing date:

Info

Title:
Numerical Investigation on Mixing Behavior of Co-Axial Jets Excited by Triangular Tabs
Author(s):
Yu Yezhen1; 2; Zhang Jingzhou2; 3; Wu Binbin1; Niu Baolian1; Li Yinglin1
(1.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China) (2.Jiangsu Province Key Laboratory of Aerospace Power System,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) (3.College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
Keywords:
co-axial jets; mixing enhancement; streamwise vortices; triangular tab
PACS:
V233.5
DOI:
-
Abstract:
Numerical investigation is carried out to illustrate the mixing behaviors of co-axial jets by the fluidic excitation of tabs. The effects of the tab number,tab apex angle and tab tilted angle on the sreamwise vorticity and temperature distribution of co-axial jets mixing flow are analyzed. The results show that the tabbed excitation induces array pairs of streamwise vortices at the trailing of corresponding tabs,making the local temperature contours to take on finger-shaped distortion and enhancing the co-axial jets mixing process. The intensity as well as the affecting zone of the individual streamwise vortex varies from the tab number. Larger tab number degrades the vortex intensity obviously due to the interaction between the adjacent tabs. Under the same total blockage of the tabs into the internal flow,the tab apex angle of 90 degree or the tab tilted angle of 30 degree seem to introduce stronger sreamwise vorticity and co-axial jets mixing,in relative to the other geometric parameters in the present.

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Last Update: 2015-06-20