Machine learning for optimal flow control in an axial compressor M. A. Elhawary, Francesco Romanò, Jean-Christophe Loiseau and Antoine Dazin Eur. Phys. J. E, 46 4 (2023) 28 Published online: 12 April 2023 DOI: 10.1140/epje/s10189-023-00284-9