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

Krishnan, A.; Manikandan, R.; Midhun, P. R.; Reeja, K. V.; Unni, V. R.; Sujith, R. I.; Marwan, Norbert; Kurths, Jürgen

doi:10.1209/0295-5075/128/14003

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

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Krishnan, A.
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Manikandan, R.
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Midhun, P. R.
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Reeja, K. V.
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Unni, V. R.
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Sujith, R. I.
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Marwan, Norbert
Potsdam Institute for Climate Impact Research;

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Kurths, Jürgen
Potsdam Institute for Climate Impact Research;

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Citation

Krishnan, A., Manikandan, R., Midhun, P. R., Reeja, K. V., Unni, V. R., Sujith, R. I., Marwan, N., Kurths, J. (2019): Mitigation of oscillatory instability in turbulent reactive flows: A novel approach using complex networks. - EPL (Europhysics Letters), 128, 1, 14003.
https://doi.org/10.1209/0295-5075/128/14003

Cite as: https://publications.pik-potsdam.de/pubman/item/item_23616

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.