Triglobal resolvent analysis of swept-wing wakes

Through triglobal resolvent analysis, we reveal the effects of wing tip and sweep angle on laminar separated wakes over swept wings. For present study, consider wings with semi-aspect ratios from $1$ to $4$ , angles $0^\circ$ $45^\circ$ attack $20^\circ$ $30^\circ$ at a chord-based Reynolds number $400$ Mach $0.1$ . Using direct numerical simulations, observe that unswept develop vortex shedding near root quasi-steady vortex. wings, is seen for low angles, while are steady high angles. To gain further insights into mechanisms flow unsteadiness, analysis used identify optimal spatial input–output mode pairs associated gains range frequencies. The three-dimensional forcing response modes harmonic fluctuations directed towards overlapping region forcing–response uncovers wavemakers self-sustained unsteady Furthermore, show low-aspect-ratio perturbations globally entire wingspan. study physical growth wake dynamics flows