“…In addition to experimental research, numerical simulation (CFD) is now widely used as a tool to provide insight into the processes in the internal spaces of turbomachines. The method allows one to study in detail the occurrence of flow disturbances, their evolution in relation to the geometric parameters of the machine ( [14] ) or the influence of geometric inaccuracies on the compressor performance ( [15] ). By applying advanced data processing methods, such as dynamic mode decomposition, detailed studies of disturbance evolution are possible ( [16] ).…”