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E. Chaparian, M. J. Amini†, A. Sedaghat, NUMERICAL SOLUTION AND EXPERIMENTAL RESULTS OF A PLANE TURBULENT FREE JET BY MODELING IN A WIND TUNNEL, 13th Annual & 2nd International Fluid Dynamics conference, Fd2010-26-28 Oct. Shiraz University Shiraz Iran.

13th Annual & 2nd International Fluid Dynamics conference
Fd2010-26-28 Oct. Shiraz University
Shiraz Iran
 
NUMERICAL SOLUTION AND EXPERIMENTAL RESULTS OF A PLANE TURBULENT FREE JET BY MODELING IN A WIND TUNNEL
 
E. Chaparian, M. J. Amini†, A. Sedaghat††
 
Department of Mechanical Engineering, Isfahan University of Technology,
84156-8311, Isfahan, Iran
† Department of Mechanical Engineering, Isfahan University of Technology,
84156-8311, Isfahan, Iran
†† Department of Mechanical Engineering, Isfahan University of Technology,
84156-8311, Isfahan, Iran
 
Abstract.
 
According to using experimental velocity distribution of a plane turbulent free jet
for testing a wind turbine in it, authors proposed a modeling of plane turbulent free jet in
wind tunnel. The essential need of this modeling is that in all experiments having been
conducted so far, the nozzles were of small sizes. In this study, a jet of air leaving a square
plane nozzle of large length that flows into a large stagnant mass of the same fluid is
considered. The free jet mixes with the surrounding fluid, creating turbulence and the jet
grows thicker. Growth of the mixing layer as a result of exchange of momentum between
stagnant fluid and a portion of the jet makes the jet's thickness increase continuously as it
goes downstream of the jet. In different stations in the axial direction, named x-direction, the
velocity distribution appears to have the same shape but it is not symmetrical with respect to
the x-axis for the flow development region. This similarity could be shown either by
analytical solutions or numerical solution. These solutions are correlated with experimental
data obtained in a wind tunnel.
 
Key words: Turbulence, Free jet, Wind tunnel

Conference Papers
Month/Season: 
October
Year: 
2010