Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Distribution of mean velocity in turbulent boundary layer over permeable surface with air blowing

Distribution of mean velocity in turbulent boundary layer over permeable surface with air blowing Abstract In the present article, we investigate the possibility of using simple physical models for predicting properties of incompressible turbulent boundary layer on permeable wall at various values of air-microblowing mass flow rate. It is shown that the velocity scaling U ∞*/δ 99 can be successfully used to approximate the distribution of mean velocity in the outer region of the boundary layer. The use of this scaling makes the velocity profiles invariant with respect to Reynolds-number variation; this circumstance largely facilitates the analysis of experimental data, making it independent of upstream flow conditions. The distribution of mean velocity in the logarithmic flow region of the boundary layer over permeable surface can be described with a modified law of the wall involving a constant C 0 equal to the same constant for canonical boundary layer, and a quantity K being a weak function of blowing ratio. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

Distribution of mean velocity in turbulent boundary layer over permeable surface with air blowing

Thermophysics and Aeromechanics , Volume 19 (1): 8 – Mar 1, 2012

Loading next page...
 
/lp/springer-journals/distribution-of-mean-velocity-in-turbulent-boundary-layer-over-2qT3saDA0t
Publisher
Springer Journals
Copyright
2012 Pleiades Publishing, Ltd.
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/S0869864312010027
Publisher site
See Article on Publisher Site

Abstract

Abstract In the present article, we investigate the possibility of using simple physical models for predicting properties of incompressible turbulent boundary layer on permeable wall at various values of air-microblowing mass flow rate. It is shown that the velocity scaling U ∞*/δ 99 can be successfully used to approximate the distribution of mean velocity in the outer region of the boundary layer. The use of this scaling makes the velocity profiles invariant with respect to Reynolds-number variation; this circumstance largely facilitates the analysis of experimental data, making it independent of upstream flow conditions. The distribution of mean velocity in the logarithmic flow region of the boundary layer over permeable surface can be described with a modified law of the wall involving a constant C 0 equal to the same constant for canonical boundary layer, and a quantity K being a weak function of blowing ratio.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Mar 1, 2012

References