Volume 128, Number 1, October 2019
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||27 November 2019|
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
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.
PACS: 43.28.Kt – Aerothermoacoustics and combustion acoustics / 89.75.Hc – Networks and genealogical trees / 47.27.Rc – Turbulence control
© EPLA, 2019
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