Active control of vortex shedding behind bluff bodies

Research Area: Fluid mechanics
Project Members:
Fallenius, B. E. G.
Fransson, J. H. M.
Sponsor: Göran Gustafsson's Foundation,   VR 

Project Description

In this project it is proposed to experimentally study active control methods in order to suppress and/or totally kill the wake instability (vortex shedding) behind bluff bodies. The first geometry that will be studied is the circular cylinder where suction and blowing alternatively will be applied on both sides of the cylinder by means of an active feed-back control loop system. Importance will be attached on the fluid dynamical response upon the control and the understanding of the fundamental fluid dynamic differences between the natural and controlled system by study boundary layer changes, turbulence statistics as well as changes of vortical structures inside the wake. An enhanced comprehension of the fluid mechanics around and behind bluff bodies as well as its effect when applying different control methods is essential in order to develop more safety, more energy efficient, and adapted design within many areas of practical application. Furthermore, the project is of central importance in order to reach a fundamental knowledge of the effect of active control and its fluid dynamics. The results will shed new light on the fluid mechanics for future development of experimental as well as theoretical models.

Publications related to the project

2004Flow around a porous cylinder subject to continuous suction or blowing
J. Fluid. Struct. 19 1031-1048 (Published)

Internal Reports related to the project

YearTitleDocument Type
2003Flow control of boundary layers and wakes Doctoral thesis