Numerical prediction of aerodynamic characteristics of prismatic cylinder by finite element method with Spalart-Allmaras turbulence model

摘要

Aerodynamic characteristic of prismatic cylinders is numerically investigated by using finite element method with Spalart-Allmaras turbulence model. The developed model is verified against the available experimental and numerical results for turbulent flow past a square cylinder. The flow behaviors for prismatic cylinders with different section-shapes are compared in terms of instantaneous and time-averaged streamlines. The trends of aerodynamic quantities, including drag and lift forces and Strouhal number with the change of the section-shape are in reasonable agreement with the existing experimental results. The results show that the fluctuating pressure is more sensitive to the change of the afterbody shape.