Dynamic Mode Decomposition of High Reynolds Number Supersonic Jet Flows
Abstract
Current design constraints have encouraged the studies of aeroacoustic fields around compressible jet flows. The present work addresses the numerical study of unsteady turbulent jet flows as a preparation for future aeroacoustic analyses of main engine rocket plumes. An in-house large eddy simulation tool is used in order to reproduce high fidelity results of compressible jet flows. The large eddy simulation formulation is written using a second order numerical scheme for a finite difference spatial discretization. Numerical simulations of perfectly expanded jets are performed and the results are compared to the literature. Dynamic mode decompositions (DMD) of the jet flow, using large size three-dimensional snapshots, are performed. Three variables are analyzed, namely, the velocity magnitude, the vorticity magnitude and the divergence of velocity. In particular, two frequencies are identified and they are linked to flow structures observed in experiments performed by other authors in the literature. The spatial shapes of the corresponding dynamic modes are also discussed.
Keywords
Cite
@article{arxiv.2301.05039,
title = {Dynamic Mode Decomposition of High Reynolds Number Supersonic Jet Flows},
author = {Sami Yamouni and Carlos Junqueira-Junior and Joao Luiz F. Azevedo and William R. Wolf},
journal= {arXiv preprint arXiv:2301.05039},
year = {2023}
}
Comments
AIAA aviation paper 2017; AIAA 2017-0497. 55th AIAA Aerospace Sciences Meeting. January 2017. arXiv admin note: substantial text overlap with arXiv:2301.00651; text overlap with arXiv:2212.12365, arXiv:2212.12353, arXiv:2301.00817