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aircraft operation (3 results)
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- Structural Loading of a Complete Aircraft Under Realistic Crash Conditions: Generation of a Load Database for Passenger Safety and Innovative Design
- The proposed paper presents hard landing simulations of large aeronautical structures using explicit F.E. codes, such as RADIOSS. The main technical difficulties arise from the dimensions and the complexity of the structures to model on the one hand, and from the complexity of the very local ruin phenomena on the...
- White papers 2004-10-01
- Evaluation of Finite Element Modeling Methodologies for the Design of Crashworthy Composite Commercial Aircraft Fuselage
- This paper aim at developing methodologies to design crashworthy composite commercial aircraft fuselages, a 2 frames section based on the A321 AIRBUS standard dimensions was manufactured by AIRBUS France, in order to be crash-tested at the Toulouse Aeronautical Test Centre. Though most p re-test numerical analyses confirmed this expected rupture...
- White papers 2004-09-30
- Overview on Drag Reduction Technologies for Civil Transport Aircraft
- Drag reduction is one of the main objectives of the transport aircraft manufacturers. This is why researches devoted to the development of new technologies aiming at drag reduction were initiated. The drag breakdown of a transport aircraft at cruise shows that the skin friction drag and the lift-induced drag constitute...
- White papers 2004-09-09
- ALISDAR: An Automatic Lightning System Detection and Recording
- In this paper, an Automatic Lightning System Detection and Recording ALISDAR have been developed. The characterization of the lightning strike to an aircraft is done by electrical and magnetic field measurements. A prototype of ALISDAR sensors have been installed on metallic dummy windows. The system was in operation during an...
- White papers 2004-04-27
- Multi-Disciplinary Optimization of a Supersonic Transport Aircraft Wing Planform
- A Multi-Disciplinary Analysis and Optimization MDAO system for the evaluation and optimization of the performance of a High-Speed Civil Transport Aircraft has been developed at ONERA within the context of the CISAP project. This paper first describes the MDO system implemented at ONERA. This MDO system is constructed by coupling...
- White papers 2004-04-26
- Aircraft Aeroelasticity Computed With Linearized Rans Equations
- Predicting the aeroelasticity stability of aircraft requires computing the unsteady generalized aeroelastic forces on the structural modal base of the aircraft. Introducing the viscous effects is a decisive step for representing the shocks correctly, notably as concerns their amplitudes and positions. In this paper Linearization of the discretized Reynolds Average...
- White papers 2003-09-12
- CFD Methods for Transport Aircraft High Lift Systems
- In this paper major results and findings of the numerical work package of the high lift programme EUROLIFT are outlined. The main objective of these studies is to validate and test numerical methods for the prediction of high lift flows for transport aircraft configurations. The activities comprise the assessment of...
- White papers 2003-09-12
- Ground Vibration Experiments on Large Civil Aircraft for Engine Imbalance Purpose
- This paper presents the experimental developments implemented by ONERA, dealing with some specific measurements for the wind milling post Fan Blade Out purpose, related to the new certification items of the Airbus A340-500 and performed during the Ground Vibration Test. Part of the success factor of operating modern large civil...
- White papers 2003-08-22
- New Methodology for Determining the Extension of Lightning Swept Stroke Zones on Airborne Vehicles
- During the lightning strike to an aircraft in flight, the lightning channel gets deformed in the aerodynamic flow and displaced along the aircraft, a so-called swept stroke. To be able to correctly determine the different levels of hazards on an aircraft zoning, the physical behavior of the lightning swept stroke...
- White papers 2003-03-17
- Thermodynamic and Electric Properties of a Lightning Arc Channel During Its Continuous Current Phase When the Lightning Strikes an Aircraft in Flight
- During lightning strikes to aircraft in flight, the lightning channel gets deformed in the airflow and displace along the aircraft, a so-called wept stroke. In this paper a model of the thermodynamic evolution of lightning channels during their continuous current phase is developed and numerically solved. In this model, the...
- White papers 2003-03-17
- Influence of High Temperature Gradient on Acoustic Liners: Beyond the Multilayer Approach
- More and more, inhabitants in the vicinity of airports and air force bases complain about aircraft annoyance. Therefore noise reduction becomes a major issue in aeronautics. A possible way of reduction to investigate is to develop acoustic liners which are directly introduced into aircraft engines; this has already be tried...
- White papers 2003-03-04
- Tasks for Improvement in Ground Vibration Testing of Large Aircraft
- This paper gives the industrial requirements for ground vibration tests GVT on large aircraft, firstly taking into account technical difficulties due to the high modal density in the very low-frequency range and secondly time reduction of such tests. Considering the finite element model to be treated, two optimizations can be...
- White papers 2001-08-21
- Prediction of Aircraft Transonic Aeroelasticity by the Linearised Euler Equations
- Predicting the aero elastic stability of aircraft requires computing the aero elastic forces on the structural modal base of the aircraft. In this paper linearization of the discretized formulation of the Euler equations in a moving grid is developed for harmonic excitations. The boundary layer conditions are detailed. The use...
- White papers 2001-03-07
- Numerical Simulation in Aeroelasticity for Complex Configurations in a Transonic Flow
- This paper describes a numerical fluid-structure coupling method using the dual time step to simulate an unsteady transonic flow. The aerodynamic and mechanical models used are described. The numerical fluid-structure coupling strategies are developed. Application of the numerical tools to a complex military aircraft configuration in a transonic flow is...
- White papers 2000-09-07
- Vibration Test on Large Aircrafts
- For the development of complex structures, mechanical engineers often deal with vibration problems. This situation leads them to perform many different types of vibration tests. In some cases such as certification, it is necessary to demonstrate that the structure will either survive or function properly when exposed to a particular...
- White papers 2000-01-27
Additional Resources
- Onera Selects Fortinet to Address Unique Security Performance Requirements
- Fortinet® -- the pioneer and leadingprovider of unified threat management UTM solutions -- today announcedthat Onera, the French national aerospace and defense research & technologyorganization, has selected Fortinet's FortiGateTM-3810A multi-threatsecurity appliance to provide firewall protection to the 10-Gbps networkset up between its headquarters and a new remote research center. Onera's...
- Articles 2007-12-04
- French noise initiative.(EUROPE)(Initiative de Recherche pour l'Optimisation acoustiqUe Aeronautique)(French aerospace research agency)(Brief Article)
- French aerospace research agency ONERA has teamed with national scientific research centre CNRS, Airbus, Dassault Aviation, Eurocopter and Snecma in a new aircraft noise reduction initiative known as IROQUA (Initiative de Recherche pour l'Optimisation acoustiqUe Aeronautique). The core of...
- Articles 2005-06-01
- Storm warning: the Dassault Rafale is poised to become Europe's premier fighter-bomber.(Cover Story)
- France's Rafale is the most capable aircraft of the three new-generation fighters developed in Europe over the last two decades. Although the Dassault Rafale, Eurofighter Typhoon, and Saab Gripen are all currently being developed as multirole aircraft, only in the case of the...
- Articles 2005-06-01
- French UAV testbed.(BUSINESS BRIEFING)
- French aerospace research agency Onera and electronics specialist Sagem are teaming up to provide researchers and engineers with a dedicated airborne platform, "Le Busard" Harrier, to support the development of new-generation electronic systems for unmanned aerial vehicles UAV and special-mission aircraft. With...
- Articles 2005-03-22
- France pursues optical stealth program.(EUROPEAN REPORT)(Brief Article)
- On November 7, France's military-procurement agency awarded a $27-million contract to EADS for the design, production, and operation of the Moyen Aeroporte de Mesures Optroniques MAMO airborne test platform airborne optronic measurement facility. The main purpose of the program is to conduct exact...
- Articles 2004-01-01
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