A Review on Active and Passive Flow Control Techniques

Abstract

Flow control technique is an important research field of aerodynamics. Flow control implies a small change of a configuration serving an ideally large engineering benefit .The aim of this paper is to study various flow control techniques. In this paper we will go through the developments in the flow control technology over last few decades and then study some modern flow control techniques which will give us a whole new viewpoint on the science of flow control. A new classification of the techniques is introduced and major contributions under them are shown in this paper. A comparative study on active and passive flow control technologies is done and theoretical drag reduction possible using these techniques. It can be concluded that active flow control technology has obvious advantages over passive control but passive control is easy to implement and practically used.