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Stability and sensitivity analysis of hydrodynamic instabilities in industrial swirled injection systems

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Academic year: 2021

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Figure

Fig. 1 Schematic representations of wave packets in flows with different stability properties: (a) stable flow, (b) convectively unstable flow, and (c) absolutely unstable flow
Fig. 3 Experimental sound pressure level and dynamic mode decomposition (DMD) spectrum of pressure based on LES snapshots
Figure 7 illustrates the global spectrum of the considered con- con-figuration. It demonstrates that all modes are stable except one single mode at x g  1.89 þ 0.01i, which is slightly unstable
Fig. 6 PVC modes based on LES/DMD and LSA; right column: global LSA adjoint modes
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