图书馆订阅: Guest
Tenth International Symposium on Turbulence and Shear Flow Phenomena
July, 7-9, 2017 , Swissotel Chicago, Chicago, Illinois, U.S.A.

DOI: 10.1615/TSFP10

THE ROLE OF VORTICITY IN TURBULENT, RECTANGULAR, FREE AND WALL JETS

pages 563-568
DOI: 10.1615/TSFP10.960
Get accessGet access

摘要

Experimental results on the near field development of a rectangular jet with aspect ratio 10 are presented. The jet issues from a sharp-edged orifice attached to a rectangular settling chamber at ReDh ~ 42,000 either in free space or parallel to a flat wall. Measurements on cross plane grids obtained with a twocomponent hot wire anemometry probe, provide information on the three-dimensional characteristics of the flow field. Data were suitably averaged over the symmetrical areas of each cross section. Mean vorticity components and terms of the axial vorticity equation were estimated by interpolation and derivation of the mean velocity measurements. Key features of this type of jet are saddleback mean axial velocity profiles and a predominant dumbbell shape of the axial mean velocity contours. These characteristics are found to be influenced by the axial vorticity distribution, which is related to two terms in the axial mean vorticity transport equation that diffuse fluid from the center of the jet towards its periphery.

Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集 订购及政策 Begell House 联系我们 Language English 中文 Русский Português German French Spain