Title

On the generation of turbulence with a perforated plate

Document Type

Article

Publication Date

1-1-2004

Publication Title

Experimental Thermal and Fluid Science

Volume

28

Issue

4

First Page

307

Keywords

Hot-wire anemometer, Perforated plate, Turbulence integral length scale, Turbulence intensity, Wind tunnel

Last Page

316

Abstract

The root-mean-square of the turbulence velocity fluctuation components, u′ and v′, and the integral length scale, L, were measured downstream of a perforated plate inside a wind tunnel test section using a hot-wire anemometer. Nine combinations of three hole diameters (D=25.4, 38.1 and 50.8 mm) and three plate solidity values (σ=35%, 50% and 60%) were investigated at three downstream locations (X=20D, 30D and 40D) for three Reynolds number values (Re= 15,000, 22,000 and 29,000). Over the range of conditions considered, the results indicated that Re had no obvious effect on the normalized turbulence parameters u′/U, v′/U and L/D. The dimensionless turbulence intensity decreased with X/D with a power law relationship, but increased with σ in an exponential fashion over the range of values considered. The plate with a 35% solidity was found to possess the highest degree of homogeneity in terms of the uniformity of the turbulence intensity over any cross-section. The turbulence was more uniform in the region where the corresponding flatness factor, F, of the turbulence fluctuation velocity was approximately equal to 3. © 2003 Elsevier Inc. All rights reserved.

DOI

10.1016/S0894-1777(03)00106-7

ISSN

08941777

Link to Full Text

Share

COinS