A Numerical Analysis of Unsteady Separated Flow by Vortex Shedding Model : 1st Report, Flow around a Square Prism

Abstract

A new discrete vortex method which combines the vortex shedding model with the singularity method has been developed for the analysis of an unsteady separated flow. As this method does not use the transformation, it can be more easily applied to the unsteady flow analysis around a body of complicated shape than usual discrete vortex methods. The method is applied to the flow calculations around a square prism with angles of attack 0°, 10°, 20°, and 30°. The calculated values of the lift and drag coefficients and the Strouhal numbers are compared with the available experimental data in good agreement.