In this paper a study of wing control surface effectiveness was carried out using numerical simulations with the advanced Reynolds Averaged Navier-Stokes solver elsA. Non-coincident meshing techniques were used as to make t he mesh generation process more flexible. The first application attempts to predict an aileron effectiveness using the...
The aim of this paper is to determine the heat fluxes received on the space vehicle wall starting from the temporal evolution of its internal face thermal map. This technique is non intrusive and measurement zones are not directly exposed to the external aggressive conditions. The ground validation phase of...
The knowledge of the solid fuel regression rate and the time evolution of the grain geometry are requested for hybrid motor design and control of its operating conditions. Two non-intrusive techniques have been applied to hybrid propulsion: both are based on wave propagation, the X-rays and the ultrasounds, through the...
The paper provides an overview of the tools which are currently available for delaying the onset of transition. Distinction is made between techniques which modify the mean flow field and techniques acting on the unstable wave's birth and development, without any action on the mean flow field. Applications of the...
For the reduction of structural noise and vibrations, passive techniques are widely used, and active control has now been widely studied in this paper. At the meeting of both approaches, semi-passive techniques have seemed to be too limited, until recently and a new technique: Synchronized Switch Damping on Inductance SSDI....
This paper describes and provides information about two mesh deformation techniques. The first one is based on an analogy with the well known singularity or panel methods, a 2-D and 3-D examples are presented. The second one consists in minimizing an energy-like function in order to preserve or improve the...
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...
Business/Technology Editors CHELMSFORD, Mass.--BUSINESS WIRE--Sept. 23, 2002 Mercury Computer Systems, Inc. (NASDAQ: MRCY), announced today that its French subsidiary, Mercury Computer Systems, S.A.R.L., has received an order for its RACE++R Series multicomputers from ONERA, the French Aeronautics and Space Research Agency, for a performance upgrade of...
This article proposes a method whereby the cross-sectional area of microstrip antennas using superposed square patches is decreased while the bandwidth is increased. The quarter-wavelength antenna principle is applied, however, the short circuits are located between two square superposed elements. The structure is completely metallic...
Articles 1998-06-01
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