Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6757705 | Journal of Wind Engineering and Industrial Aerodynamics | 2014 | 7 Pages |
Abstract
The conditions required for a flow resistance element to uniformize a non-uniform flow in a two-dimensional channel were derived in terms of a non-uniform porosity profile. The validity of this approach was confirmed through a numerical analysis over a wide range of parameter conditions. The proposed equation for the non-uniform porosity distribution gave satisfactory results for a wide variety of velocity profiles at the channel inlet. For sufficiently thick orifices, the equation was valid over a wide range of average porosities, from 0.3 to 0.6. For thin orifices, satisfactory uniformity was obtained only for a mean effective porosity over a narrow range of 0.42-0.48. Two different methods of generating variable porosity, using a constant hole size plus variable blocking plates or using a constant blocking plate size plus variable holes, did not show any appreciable difference in results.
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Authors
M.K. Choi, Y.B. Lim, H.W. Lee, H. Jung, J.W. Lee,