Revisiting the One-shot method for modeling limit cycle oscillations: Extension to two-degree-of-freedom systems

A Flutter Prediction Framework in the Open-Source SU2 Suite

“…The reference point for the moment calculation is set at 0.25 , where is the aerodynamic chord of the airfoil. It can be seen that the SU2 results compare well with [10] even with only two harmonics, since the amplitude is kept at moderate levels. Both the amplitude and the relative phase difference between the two modes of vibration is accurately captured.…”

“…Fig.2Variation of (a) the lift, and (b) the moment coefficient during the pitching motion, plotted against the results found in Ref [10]. …”

“…( 40), the derivatives of the aerodynamic forces with respect to and respectively, are neglected. This approximation has been shown to not affect the prediction of the flutter solution [10], while it accelerates the solution process since the sensitivity of the forces significantly increases the computational cost.…”

“…The results from the flutter/LCO prediction with SU2 are presented in Fig. 3, against available data in [10,20]. Zhang et al in [20] performed TM simulations, while Li & Ekici [10] used their "one-shot" approach with one harmonic.…”

“…3, against available data in [10,20]. Zhang et al in [20] performed TM simulations, while Li & Ekici [10] used their "one-shot" approach with one harmonic. The imposed pitching amplitude is shown in Fig.…”