Numerically Simulating the Aerodynamic Interference Effect of Mean Aerodynamic Force Coefficients on Configurations of Bluff Bodies in Tandem

Abstract

In order to study the aerodynamic interference effects of single and multiple blunt bodies on the rectangular, reverse right angle, reverse inner convex arc, and reverse outer convex arc sections of serial bluff bodies, the finite volume method and the SIMPLE algorithm, the uniform viscous incompressible flow around blunt bodies at a subcritical Reynolds number was simulated by computational fluid dynamics (CFD) technology. The aerodynamic coefficient was analyzed, and the aerodynamic coefficients under various conditions (e.g., different wind angles of attack, chamfer dimensions, and cylinder spacing) were calculated. Results show that the drag and lift, as well as the torque coefficients, of each section of a single blunt decrease in accordance with the sequence of wind flow around the rectangular, reverse right angle, reverse inner convex arc, and reverse outer convex arc sections at different wind angles of attack. The drag and lift, as well as the torque coefficient, of the reverse right angle, reverse inter convex arc, and reverse outer convex arc sections successively decrease with increasing chamfer dimensions. The downstream blunt body produces more significant changes than does the upstream blunt body in terms of variation trend and value because of the aerodynamic interference effect.