Mitigation of oscillatory instability in turbulent reactive flows: A novel approach using complex networks. (27th November 2019)

• Record Type: Journal Article
• Authors: Krishnan, Abin; Manikandan, R.; Midhun, P. R.; Reeja, K. V.; Unni, V. R.; Sujith, R. I.; Marwan, Norbert; Kurths, Jürgen
• Is Part Of: Europhysics letters. Volume 128:Number 1(2019)
• Publication Date: 2019-11-27
• Subjects: 43.28.Kt -- 89.75.Hc -- 47.27.Rc; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/128/14003
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: We present a novel and an efficient way to mitigate oscillatory instability in turbulent reactive flows. First, we construct weighted spatial correlation networks from the velocity field obtained from high-speed particle image velocimetry. Using network measures, we identify the optimal location for implementing passive control strategies. By injecting micro-jets at this optimal location, we are able to reduce the amplitude of the pressure oscillations to a value comparable to what is observed during the state of stable operation. This approach opens up new avenues to control oscillatory instabilities in turbulent flows.