Simulation of Transonic Buffet Using a Time-Spectral Method

Plante, Frédéric; Laurendeau, Éric

doi:10.2514/1.j057224

Cited by 12 publications

(8 citation statements)

References 44 publications

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“…He also found the S-A model could reproduce the buffet unsteadiness with reasonable buffet frequencies but the amplitude were underpredicted. In addition to the turbulence model, a number of authors have reported similar sensitivity studies on the numerical discretization scheme, the time steps and grid resolution [50][51][52][53][54].…”

Section: Numerical Simulation By Cfdmentioning

confidence: 99%

Transonic aeroelasticity: A new perspective from the fluid mode

Gao

Zhang

2020

Progress in Aerospace Sciences

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Within the transonic regime, the aeroelastic problems exhibit many unique characteristics compared with subsonic and supersonic cases. Although a lot of research has been carried out in this field, the underlying mechanisms of these complex phenomena are not clearly understood yet, resulting in a challenge in the design and use of modern aircraft. This review summarizes the recent investigations on nonclassical transonic aeroelastic problems, including transonic buzz, reduction of transonic buffet onset, transonic buffeting response and frequency lock-in phenomenon in transonic buffet flow. After introducing the research methods in unsteady aerodynamics and aeroelastic problems, the dynamical characteristics as well as the physical mechanisms of these phenomena are discussed from the perspective of the fluid mode. In the framework of the ROM (reduced order model) -based model, the dominant fluid mode (or the eigenvalue) and its coupling process with the structural model can be clearly captured. The flow nonlinearity was believed to be the cause of the complexity of transonic aeroelasticity. In fact, this review indicates that the complexity lies in the decrease of the flow stability in the transonic regime. In this condition, the fluid mode becomes a principal part of the coupling process, which results in the instability of the fluid mode itself or the structural mode, and thus, it is the root cause of different transonic aeroelastic phenomena.

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Section: Numerical Simulation By Cfdmentioning

confidence: 99%

Transonic aeroelasticity: A new perspective from the fluid mode

Gao

Zhang

2020

Progress in Aerospace Sciences

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“…Le Balleur & Girodroux- Lavigne (1989) and Edwards (1993) used viscous-inviscid coupling strategies. However, the bulk of the numerical simulations reported in the literature is carried out with URANS models (Goncalves & Houdeville 2004;Thiery & Coustols 2006;Iovnovich & Raveh 2012;Grossi, Braza & Hoarau 2014;Giannelis, Levinski & Vio 2018;Plante & Laurendeau 2019). These simulations identified frequencies in the range of those obtained experimentally.…”

Section: Introductionmentioning

confidence: 99%

Link between subsonic stall and transonic buffet on swept and unswept wings: from global stability analysis to nonlinear dynamics

et al. 2020

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“…Confirming the robustness of this 2D turbulent instability, the same frequencies were recovered when the boundary-layer over the laminar OALT25 airfoil was tripped to induce transition to turbulence [5]. From a numerical point of view, the literature is prevalently based on 2D Reynolds-Averaged Navier-Stokes equations (RANS) studies [6][7][8][9][10][11][12][13]. Although a considerable sensitivity to numerical schemes and turbulence models exists [6], the 2D RANS calculations can recover the experimental frequencies associated with the chordwise shock-oscillations.…”

Section: Introductionmentioning

confidence: 60%

System Identification of Two-Dimensional Transonic Buffet

et al. 2022

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When modeled within the unsteady Reynolds-Averaged Navier-Stokes framework, the shock-wave dynamics on a two-dimensional aerofoil at transonic buffet conditions is characterized by time-periodic oscillations. Given the time series of the lift coefficient at different angles of attack for the OAT15A supercritical profile, the sparse identification of nonlinear dynamics (SINDy) technique is used to extract a parametrized, interpretable and minimal-order description of this dynamics. For all of the operating conditions considered, SINDy infers that the dynamics in the lift coefficient time series can be modeled by a simple parametrized Stuart-Landau oscillator, reducing the computation time from hundreds of core hours to seconds. The identified models are then supplemented with equally parametrized measurement equations and low-rank DMD representation of the instantaneous state vector to reconstruct the true lift signal and enable real-time estimation of the whole flow field. Simplicity, accuracy and interpretability make the identified model a very attractive tool towards the construction of real-time systems to be used during the design, certification and operational phases of the aircraft life cycle.

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Simulation of Transonic Buffet Using a Time-Spectral Method

Cited by 12 publications

References 44 publications

Transonic aeroelasticity: A new perspective from the fluid mode

Transonic aeroelasticity: A new perspective from the fluid mode

Link between subsonic stall and transonic buffet on swept and unswept wings: from global stability analysis to nonlinear dynamics

System Identification of Two-Dimensional Transonic Buffet

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