The Spatial Structure of Passively Simulated Atmospheric Boundary Layer Turbulence

Featured Application This study conducted an investigation on the spatial structure of large-scale boundary layer turbulence simulated by a wind tunnel, and through comparative analysis with isotropic turbulence theory, some improved coherence models are proposed based on the experimental results. 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.

Automated summary

This study investigated the spatial structure of large-scale boundary layer turbulence simulated by a wind tunnel, proposing improved coherence models based on experimental results. The passively simulated atmospheric turbulence was found to conform to isotropic turbulence assumption on the horizontal plane, but the interference of nonisotropic turbulence components cannot be ignored.