A CFD simulation of the Airbus A320 ATRA encountering broadband atmospheric turbulence based on an isotropic von Kármán spectrum is presented and analyzed. The Disturbance Velocity Approach within the DLR flow solver TAU is used to represent the velocities of the atmospheric turbulence in the simulation. Statistical analysis of global and spanwise lift coefficients as well as local \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$c_p$$\end{document} spectra demonstrate the influence of atmospheric turbulence on the aerodynamic characteristics of the aircraft. The impact of the load fluctuations at the engine and the flap track fairings on the global and local lift spectra of wing and aircraft are evaluated. Pressure spectra on the wing’s upper surface, evaluated at selected spanwise positions, allow a detailed assessment of the influence of flap track fairing and engine. Finally, the results are compared to previous investigations of a clean wing in atmospheric turbulence. It can be shown, that the aerodynamic response of the aircraft, relevant in terms of flight dynamics and passenger comfort, is well represented by the wing without considering the loads occurring on flap track fairings or engine. Since especially the engine has relevant contributions to the load spectra at higher wave numbers, it should be considered when evaluating the effect on the aircraft structure.
Numerical Studies on the Impact of Atmospheric Turbulence on Aircraft Loads
Notes Numerical Fluid Mech.
2024-10-18
21 pages
Article/Chapter (Book)
Electronic Resource
English