Reynolds-Averaged Navier-Stokes Simulations of Shock Buffet on Half Wing-Body Configuration

Sartor, Fulvio; Timme, Sebastian

doi:10.2514/6.2015-1939

Cited by 22 publications

(22 citation statements)

References 25 publications

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“…For the swept wing the unstable small amplitude bending oscillations probably depend directly on the development of buffet phenomenon: a dynamic interaction between the shock wave and the separation of the boundary layer which produces an unsteady variation in the pressure distribution along the chord of the wing. The buffet phenomenon is well known in literature and is studied, as an example, in [24][25][26] and in the experimental research discussed in [27]. Even if all of these cited works refer to three-dimensional configurations, these studies on transonic flow instabilities concern rigid models: in other words the elasticity effects of the wing box structure are not considered assuming that the buffet phenomenon does not depend on elastic deformations of the lifting surfaces.…”

Section: Results Of the Fluid Structure Interaction Analysesmentioning

confidence: 99%

Aeroelastic Analysis of Wings in the Transonic Regime: Planform’s Influence on the Dynamic Instability

Chiarelli

Bonomo

2016

International Journal of Aerospace Engineering

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This paper presents a study of transonic wings whose planform shape is curved. Using fluid structure interaction analyses, the dynamic instability conditions were investigated by including the effects of the transonic flow field around oscillating wings. To compare the dynamic aeroelastic characteristics of the curved wing configuration, numerical analyses were carried out on a conventional swept wing and on a curved planform wing. The results confirm that, for a curved planform wing, the dynamic instability condition occurs at higher flight speed if compared to a traditional swept wing with similar profiles, aspect ratio, angle of sweep at root, similar structural layout, and similar mass. A curved wing lifting system could thus improve the performances of future aircrafts.

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Section: Results Of the Fluid Structure Interaction Analysesmentioning

confidence: 99%

Aeroelastic Analysis of Wings in the Transonic Regime: Planform’s Influence on the Dynamic Instability

Chiarelli

Bonomo

2016

International Journal of Aerospace Engineering

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“…These buffet cells are typical of the 3D transonic buffet. Sartor and Timme [32] also observed these complex structures in the spanwise direction typical of the 3D buffet. They studied the effects of different parameters such as the Mach number, angle of attack, and turbulence model on URANS simulations.…”

mentioning

confidence: 85%

“…10c, Fig. 12, Sartor and Timme [32], and Sugioka et al [17]), while the tendency with the Mach number is less clear and needs further study. Furthermore, a convective behavior is found at the buffet Strouhal number on the wing for all models.…”

Section: A Strouhal Numbers and Convection Velocities Summarymentioning

confidence: 95%

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Analysis and Comparison of Transonic Buffet Phenomenon over Several Three-Dimensional Wings

et al. 2019

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“…Sartor and Timme [20][21][22][23] carried out an extensive study of the RBC12 configuration with (U)RANS and DDES. They simulated unsteady shock motion with various turbulence models, but observed an effect on the buffet onset incidence [23]. They reported Strouhal numbers in the range 0.1 to 0.4 with unsteadiness mostly located on the outer part of the wing.…”

Section: Introductionmentioning

confidence: 99%

Similitude between 3D cellular patterns in transonic buffet and subsonic stall

Plante¹,

Dandois²,

Laurendeau

2019

AIAA Scitech 2019 Forum

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This paper studies the similitude between the 3D cellular patterns which appears in the simulation of transonic buffet and subsonic stall phenomenon using RANS/URANS simulations. These wings are obtained from the extrusion of a 2D airfoil with an added sweep angle and periodic boundary conditions imposed at both ends. This numerical setup allows to study three-dimensional buffet on the simplest configuration possible. Numerical solutions exhibit three-dimensional flows in the form of buffet cells. The latter are convected towards the wing tip when a sweep angle is added leading to the superposition of two frequencies. The first one is independent of the sweep angle and is characteristic of two-dimensional buffet. The second one increases with the sweep angle and is related to the convection of the buffet cells. These cells are reminiscent of the stall cells which are well-known but for low speed flow conditions. Solutions of the URANS equations for infinite swept wings in stall conditions at low speed are computed showing the same convection of the cellular patterns. These results lead us to think the discrepancies between 2D and 3D buffet are caused by the appearance of stall cells, which are the same as buffet cells, and not from a modification of the shock wave boundary layer interaction.

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Reynolds-Averaged Navier-Stokes Simulations of Shock Buffet on Half Wing-Body Configuration

Cited by 22 publications

References 25 publications

Aeroelastic Analysis of Wings in the Transonic Regime: Planform’s Influence on the Dynamic Instability

Aeroelastic Analysis of Wings in the Transonic Regime: Planform’s Influence on the Dynamic Instability

Analysis and Comparison of Transonic Buffet Phenomenon over Several Three-Dimensional Wings

Similitude between 3D cellular patterns in transonic buffet and subsonic stall

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