Feedback control of bimodal wake dynamics
- 388 Downloads
Feedback control is applied to symmetrize the bimodal dynamics of a turbulent blunt body wake. The flow is actuated with two lateral slit jets and monitored with pressure sensors at the rear surface. The physics-based controller is inferred from preliminary open-loop tests and is capable of symmetrizing the wake. A slight pressure recovery is achieved due to the net balance between the favourable effect of wake symmetrization and adverse effect of shear-layer mixing and vortex shedding amplification.
We warmly thank J. M. Breux and J. Laumonier for the unconditional support during the experiments. RL and DB are supported by the OpenLab Fluidics between PSA Peugeot Citroën and Institut Pprime.
- Ahmed SR, Ramm G, Faltin G (1984) Some salient features of the time-averaged ground vehicle wake. SAE Tech. paper, technical reportGoogle Scholar
- Barros D (2015) Wake and drag manipulation of a bluff body using fluidic forcing. Ph.D. thesis, École Nationale Supérieure de Mécanique et d‘Aérotechnique (ISAE-ENSMA)Google Scholar
- Barros D, Borée J, Noack BR, Spohn A, Ruiz T (2016b) Bluff body drag manipulation using pulsed jets and Coanda effect. J Fluid Mech (in print) Google Scholar
- Pfeiffer J, King R (2012) Multivariable closed-loop flow control of drag and yaw moment for a 3D bluff body. AIAA paper (2012–2802)Google Scholar