Similarity analysis of the momentum field of a subsonic, plane air jet with varying jet-exit and local Reynolds numbers
Article
Article Title | Similarity analysis of the momentum field of a subsonic, plane air jet with varying jet-exit and local Reynolds numbers |
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ERA Journal ID | 1298 |
Article Category | Article |
Authors | Deo, Ravinesh C. (Author), Nathan, Graham J. (Author) and Mi, Jianchun (Author) |
Journal Title | Physics of Fluids |
Journal Citation | 25 (1), pp. 015115-1 |
Number of Pages | 32 |
Year | 2013 |
Place of Publication | College Park, MD 20740 United States |
ISSN | 1070-6631 |
1089-7666 | |
Digital Object Identifier (DOI) | https://doi.org/10.1063/1.4776782 |
Abstract | A similarity analysis is presented of the momentum field of a subsonic, plane air jet over the range of the jet-exit Reynolds number Reh (≡ Ubh/υ where Ub is the area-averaged exit velocity, h the slot height, and υ the kinematic viscosity) = 1500 − 16 500. In accordance with similarity principles, the mass flow rates, shear-layer momentum thicknesses, and integral length scales corresponding to the size of large-scale coherent eddy structures are found to increase linearly with the downstream distance from the nozzle exit (x) for all Reh. The autocorrelation measurements performed in the near jet confirmed reduced scale of the larger coherent eddies for increased Reh. The mean local Reynolds number, measured on the centerline and |
Keywords | local Reynolds number; confined flow; plane jet; shear turbulence; subsonic flow; Reynolds number effect; vortex shedding; jet mixing and entrainment Kolmogorov scales; Taylor scales; integral length scales; fluid dynamics |
ANZSRC Field of Research 2020 | 401201. Aerodynamics (excl. hypersonic aerodynamics) |
401213. Turbulent flows | |
401299. Fluid mechanics and thermal engineering not elsewhere classified | |
490109. Theoretical and applied mechanics | |
Public Notes | © 2013 Crown. Published version deposited in accordance with the copyright policy of the publisher (American Institute of Physics). |
Byline Affiliations | Department of Mathematics and Computing |
University of Adelaide | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q1vz9/similarity-analysis-of-the-momentum-field-of-a-subsonic-plane-air-jet-with-varying-jet-exit-and-local-reynolds-numbers
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