Open and closed-loop control of a triangular bluff body using rotating cylinders. Issue 1 (July 2017)

• Record Type: Journal Article
• Authors: Raibaudo, C.; Zhong, P.; Martinuzzi, R.J.; Noack, B.R.
• Is Part Of: IFAC-PapersOnLine. Volume 50:Issue 1(2017)
• Page Start: 12291
• Page End: 12295
• Publication Date: 2017-07
• Subjects: Flow control -- Closed-loop control -- Machine learning -- Genetic programming; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2017.08.2475
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: The active control of vortex shedding from a bluff body consisting of three rotating cylinders in triangular arrangement is studied numerically and experimentally. The flow is characterized at low Reynolds number Re ~ 4000 - 6000. Open-loop cases are considered to understand the influence of maximum rotation rate Ω and the non-dimensional forcing frequency F * scaled by the cylinder radius R and the free-stream velocity U∞ . Feedback control is considered by acquiring the hot-wire sensor signal in the wake and using it for the cylinders rotation speeds update. Adaptive and robust controllers are also be designed for the closed-loop control. As the parametric space for the controllers parameters is very large, machine learning using genetic programming will be a major technique for the command law optimization.