Airbus

About: Airbus is a company organization based out in Bengaluru, Karnataka, India. It is known for research contribution in the topics: Fuselage & Signal. The organization has 10633 authors who have published 13089 publications receiving 88354 citations. The organization is also known as: Airbus Commercial Aircraft.

Aerodynamic Optimization of Subsonic Flying Wing Configurations

Abstract: The paper presents some aerodynamic results of initial design studies carried out at ONERA and Airbus France, on flying wing configurations. A description of the analysis and the design process, using CFD tools, is given and some results regarding the effects of the planform are presented.

Process and a Device for the Machining of Panels

Abstract: A machining tool for machining a panel is arranged in a working area of a machining surface of the panel. A holding element is arranged in a support area located on a holding surface of the panel, opposing the machining surface and on an opposite side in relation to the panel to the working area. The operating machining tool and the holding element are displaced on the panel in a co-coordinated manner according to movement presenting at least one component tangentially to the surface of the panel in such a way as to maintain the opposition of the support area and the working area during the displacement of the tool in order to machine at least a part of the machining surface.

Experimental assessment of Astrée on safety-critical avionics software

Abstract: Astree is a parametric Abstract Interpretation based static analyser that aims at proving the absence of RTE (Run-Time Errors) in control programs written in C. Such properties are clearly safety properties since the behaviour of a C program is undefined after a RTE. When it analyses a program of the class for which it is specialised, Astree is far more precise than general purpose static analysers. Nevertheless, for safety and industrial reasons, the small number of false alarms first produced by the tool must be reduced down to zero by a new fine tuned analysis. Through the description of experiments made on real programs, the paper shows how Abstract Interpretation based static analysis will contribute to the safety of avionics programs and how a user from industry can achieve the false alarm reduction process via a dedicated method.

Computational strategy for predicting CROR noise at low-speed Part I: review of the numerical methods

Abstract: This paper is the first part of a series of three papers dedicated to the prediction of lowspeed interaction noise of an isolated contra-rotating open rotor (CROR). The objective of this study is to assess available analytical and numerical methodologies in terms of robustness, performance and accuracy. The analytical procedure follows the classical Sears’ theory, while the numerical procedure follows a two-step approach based on CFD coupled with the analogy of Ffowcs Williams-Hawkings (FWH). Concerning the numerical tools, both chorochronic (single-passage) and Chimera (full-annulus) approaches are considered. The prediction of interaction noise requires fulfilling three modelling steps: the aerodynamic perturbations, the rotor unsteady blade response and the resulting noise radiation. Comparisons with noise measurements are provided. It is shown that the results are highly sensitive to the description of the incoming wake deficit. The chorochronic approach, as a single blade passage is computed, allows the use of much finer meshes than the Chimera approach and requires a lower computational cost. This approach is therefore highly attractive for computing isolated axisymmetric configurations.

Validation of Marker Material Flow in 4mm Thick Friction Stir Welded Al 2024‐T351 through Computer Microtomography and dedicated Metallographic Techniques

Abstract: This study forms part of a joint three year project between the GKSS-Forschungszentrum and Airbus Deutschland titled "Effect of material flow patterns on the properties of friction stir welds in aluminium alloys for aircraft structures" -EMFASIS. The global aim of our research project is to identify how process and geometric parameters such as weld tool geometry influence the weld energy and subsequent joint properties of four friction stir welded aerospace grade aluminium alloys. The current study reports on the visualisation and displacement of a Ti powder marker material dispersed within the weld zone and investigated with the aid of X-ray computer microtomography (μCT) and dedicated metallographic techniques.