FLOW CONTROL AROUND A 3D-BLUFF BODY USING PASSIVE DEVICE

Abstract

This article focuses on the flow control around an Ahmed body using deflector plate. The coefficient of drag was obtained numerically for different flow velocities. The study was carried out using a k-ɛ model for an Ahmed body of 25o rear slant. Grid independence studies were carried out prior to the simulation in order to validate the selected turbulence model. It was observed that coefficient of drag decreases with the increase in flow velocity whereas the lift coefficient increases. A maximum of 13.34 % decrease in drag coefficient was observed for inlet flow velocity of 80 m/s.