2006 Volume 62 Issue 1 Pages 78-90
In this study, aerodynamic characteristics of square prism in a uniform flow with respect to various angles of attack were investigated using LES turbulence model. As a result, mean forces, drag and lift, mean surface pressure, and mean flow patterns for all attack angles were met well with the experiments. It was found that computational domain in the spanwise direction gave strong impacts on fluctuations, drag, lift, and pressure, indicating that spanwise length should be long enough to evaluate quantitatively. Regarding power spectral density for fluctuating aerodynamic forces, the predictions were in good agreements with experiments in dominated frequencies. Finally, we proposed an estimation method of fluctuating aerodynamic forces with no spanwise length dependency, and confirmed the validity of the approach using the numerical results.
Proceedings of the JSCE Earthquake Engineering Symposium
Environmental systems research
