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

Abstract

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.

Quantification of Limit Cycle Oscillations in Nonlinear Aeroelastic Systems with Stochastic Parameters

“…The physical model presented in Figure 1 is a two-dimensional airfoil, oscillating in pitch and plunge, which has been employed by many authors [5][6][7][8][9].…”

“…Quantification of airfoil LCOs via analytical and/or semianalytical techniques has been an active area of research for many years. It has stimulated the interests and curiosities of many researchers [3][4][5][6][7][8][9]. Due to the design and manufacturing errors, uncertainties are usually inevitable in airfoil aeroelastic systems [10].…”

Numerical Investigation into Flutter and Flutter-Buffet Phenomena for a Swept Wing and a Curved Planform Wing

“…However, recent developments in our research on this wing configuration [20] have led to new areas of study that need further investigation. We have thus conducted further analyses aimed at a more accurate computation of the aerodynamic efficiency of the studied wings and at a more detailed definition and understanding of the aeroelastic instability phenomena which occur for swept and curved wings in the transonic regime.…”

“…Thus, although the planforms of wings are different, the errors due to the numerical approach are of the same order of magnitude. The geometry of the examined wings is described in [20]. For both wings, highly refined meshes were constructed and analysed in the transonic regime by assuming the models as rigid: that is, the geometry of the wings is not modified by the aerodynamic loads.…”

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

“…In the article titled "Aeroelastic Analysis of Wings in the Transonic Regime: Planform's Influence on the Dynamic Instability" [1], there was an error in reference [20] which should be corrected as follows.…”