The Spatial Structure of Passively Simulated Atmospheric Boundary Layer Turbulence

Three types of turbulence fields were investigated using a research method combining wind tunnel tests and theoretical analysis to further explore the spatial structure of atmospheric boundary layer turbulence, which was passively simulated by a wind tunnel. The fundamental theory of turbulence is introduced, and some traditional theoretical coherence models based on isotropic turbulence theory are derived. The difference between the theoretical results and the passive simulation of atmospheric boundary layer turbulence was compared and discussed. The analysis results show that the passively simulated atmospheric turbulence basically conformed to the homogeneous isotropic turbulence assumption on the horizontal plane, but the interference of the nonisotropic turbulence components cannot be ignored either. Finally, some improvements were made to the traditional coherence function model based on the experimental results to apply the passively simulated atmospheric boundary layer turbulence.

Download Full-text

Statistical Analysis of Wind Tunnel and Atmospheric Boundary Layer Turbulent Flows

Wind Tunnel Designs and Their Diverse Engineering Applications ◽

10.5772/54088 ◽

2013 ◽

Author(s):

Adrian Roberto ◽

Guilherme Sausen ◽

Acir M.

Keyword(s):

Boundary Layer ◽

Statistical Analysis ◽

Wind Tunnel ◽

Atmospheric Boundary Layer ◽

Turbulent Flows

Download Full-text

A new atmospheric boundary layer wind tunnel simulation methodology for wind effects on large cooling towers considering wind environment variations

Advances in Structural Engineering ◽

10.1177/1369433218809899 ◽

2018 ◽

Vol 22 (5) ◽

pp. 1194-1210 ◽

Cited By ~ 2

Author(s):

XX Cheng ◽

X Chen ◽

YJ Ge ◽

H Jiang ◽

L Zhao

Keyword(s):

Boundary Layer ◽

Wind Tunnel ◽

Atmospheric Boundary Layer ◽

Model Test ◽

Test Results ◽

Wind Effects ◽

Simulation Methodology ◽

Codes Of Practice ◽

Wind Tunnel Simulation ◽

Tunnel Model

The traditional atmospheric boundary layer wind tunnel model test practice employs wind fields, the flow characteristics of which are in accordance with the empirical formulae of the atmospheric turbulence presented in Codes of Practice and monographs. However, the empirical formulae presented in Codes of Practice and monographs cannot truthfully reflect the high variations of the realistic atmospheric turbulence which sometimes aggravates wind effects on structures. Based on model tests conducted in a multiple-fan actively controlled wind tunnel, it is found that most wind effects on large cooling towers change monotonically with the increase in free-stream turbulence, and the model test results are more unfavorable for a flow field of low turbulence intensity than for a flow field of high turbulence intensity with respect to the measured coherences. Thus, a new atmospheric boundary layer wind tunnel simulation methodology for wind effects on circular cylindrical structures is proposed to overcome the deficiency of the traditional atmospheric boundary layer wind tunnel model tests. The new simulation methodology includes the simulation of two realistic atmospheric boundary layer flow fields with the highest and the lowest turbulence intensities in the wind tunnel and the envelopment of model test results obtained in the two flow fields (e.g. the mean and fluctuating wind pressure distributions, the power spectral density, the coherence function, and the correlation coefficient). The superiority of the new atmospheric boundary layer wind tunnel simulation methodology over the traditional model test practice is demonstrated by comparing the model test results with the full-scale measurement data.

Download Full-text

Hierarchical similarity in the atmospheric boundary layer turbulence

Progress in Natural Science Materials International ◽

10.1080/10020070512331343193 ◽

2005 ◽

Vol 15 (12) ◽

pp. 1110-1116 ◽

Cited By ~ 1

Author(s):

Liu Gang ◽

Li Xin ◽

Jiang Weimei ◽

Li Min

Keyword(s):

Boundary Layer ◽

Atmospheric Boundary Layer ◽

Boundary Layer Turbulence

Download Full-text

Characterisation of the Dome C Atmospheric Boundary Layer Turbulence with a Non-Doppler Acoustic Radar

EAS Publications Series ◽

10.1051/eas:2007068 ◽

2007 ◽

Vol 25 ◽

pp. 31-34

Author(s):

J.S. Lawrence ◽

M.C.B. Ashley ◽

C.S. Bonner ◽

S. Bradley ◽

D. Luong-Van ◽

...

Keyword(s):

Boundary Layer ◽

Atmospheric Boundary Layer ◽

Boundary Layer Turbulence

Download Full-text

Development of Boundary Layer in CRIACIV in Florence (Prato) and Comparison with CFD

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.820.359 ◽

2016 ◽

Vol 820 ◽

pp. 359-364

Author(s):

Marek Magát ◽

Ivana Olekšáková ◽

Juraj Žilinský

Keyword(s):

Fluid Dynamics ◽

Boundary Layer ◽

Computational Fluid Dynamics ◽

Wind Tunnel ◽

Atmospheric Boundary Layer ◽

Comparison Of The Results

In this article are described the results from testing profile of atmospheric boundary layer in BLWT (Boundary layer wind tunnel) in Florence (Prato), Italy with emphasis on comparison of the results with simulations in CFD (Computational fluid dynamics) software OpenFoam. The values are compared with calculated values from EuroCode.

Download Full-text