A spatial–temporal analysis approach for flutter predictions using decoupled and fully-coupled methods

Accurate and efficient numerical predictions of flutter is essential for the turbomachinery industry. The decoupled method has been main workhorse industry decades thanks to its low computational resources required. However, there arises need an innovative propulsion architecture a lightweight material, which hinders accuracy effectiveness method. Hence, use fully-coupled methods steadily increasing. Despite more demanding needed perform simulations, large amount data generated in time-domain not often used efficiently. Typically aeroelastic stability judged straightforward manner using logarithmic decrement. Although this global parameter useful compare among configurations, it yields almost no meaningful understanding physical vibration mechanisms. In present paper, spatial–temporal analysis approach based on Hilbert transform proposed. It can work well with non-linear non-stationary typically from solutions. addition, transform-based designed be consistent conventional energy when newly developed applied simulation data. three examples, each particular flow mechanisms interest (i.e. tip clearance, laminar separation bubble, stall). new shown effectively elucidate associated decomposition space time.