Studying Effects of Injected Flow on Drag Coefficients Over Semi Perforated Circular Cylinder

Abstract

A-control volume cross section, m 2 ; A s-area reference, m 2 ; C w-non-dimensional mass flow rate; C D-drag coefficient; F D-drag force, N; F x-force in x direction, N; D-tube diameter, m; L-prototype length, m; m-injected mass flow rate, kg/s; Remain flow Reynolds number; uvelocity in x direction, m/s; V-air velocity passed through the holes, m/s; V x-air velocity passed through the holes in x direction, m/s; -kinematics viscosity, m 2 /s; ρdensity, kg/m 3 ; μ-dynamic viscosity; Pa×s; -volume, m 3 ; β-angle of hole's begin, Rad. Subscript ∞-free stream condition.