Abstract
Turbulent wall-pressure fluctuations are major sources of noise and their numerical calculations have been important topics in engineering fields. In this paper, large eddy simulation is conducted to study spectral behaviors of turbulent wall-pressure fluctuations. The roughness was simulated by using an array of 10 off-set square columns extending in the vertical directions on the bottom surface, and local downstream aerodynamic fields were numerically investigated. The wind speed fluctuations in the flow field and the pressure fluctuations at the bottom of the flow field are monitored at a certain cross-section when varying square column heights and wind turbulence conditions at the wind speed inlet. Frequency spectral characteristics are analysed and the influence factors of wall-pressure fluctuations are explored.
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