Mean flow and turbulence measurements of the impingement wall jet on a semi-circular convex surface

Mean flow and turbulence measurements of the impingement wall jet on a semi-circular convex surface The detailed mean flow and turbulence measurements of a turbulent air slot jet impinging on two different semi-circular convex surfaces were investigated in both free jet and impingement wall jet regions at a jet Reynolds number Re w=12,000, using a hot-wire X-probe anemometer. The parametric effects of dimensionless circumferential distance, S/W=2.79–7.74, slot jet-to-impingement surface distance Y/W=1–13, and surface curvature D/W=10.7 and 16 on the impingement wall jet flow development along a semi-circular convex surface were examined. The results show that the effect of surface curvature D/W increases with increasing S/W. Compared with transverse Reynolds normal stress, $$ \overline {v^2 } /U_{\rm m}^2 $$ , the streamwise Reynolds normal stress, $$ \overline {u^2 } /U_{\rm m}^2 $$ , is strongly affected by the examined dimensionless parameters of D/W, Y/W and S/W in the near-wall region. It is also evidenced that the Reynolds shear stress, $$ - \overline {uv} /U_{\rm m}^2 $$ is much more sensitive to surface curvature, D/W. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Mean flow and turbulence measurements of the impingement wall jet on a semi-circular convex surface

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Publisher
Springer-Verlag
Copyright
Copyright © 2003 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-002-0546-0
Publisher site
See Article on Publisher Site

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