Mitigation of oscillatory instability in turbulent reactive flows: A novel approach using complex networks

¹ Indian Institute of Technology Madras - Chennai 600036, India
² University of California San Diego - San Diego, CA 92093, USA
³ Potsdam Institute for Climate Impact Research - Potsdam 14412, Germany
⁴ Humboldt University Berlin - Newtonstr. 15, 12489 Berlin, Germany
⁵ Institute for Complex Systems and Mathematical Biology, University of Aberdeen - Aberdeen AB 24 UE, UK

Received: 19 August 2019
Accepted: 7 October 2019

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.