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Generally, numerical simulation of flows provides decision assistance elements: for design, dimensioning, prediction of operation. It has become very reliable because it is based on theoretical foundations and models perfected after basic physical experiments and validations under realistic operating conditions.

This is an original quasi-optical device, designed to divert a beam which is electromagnetic and not light, for example X-band radio waves. No mechanical movement. It’s controlled by varying the properties of a rather special lens – made of plasma – a material state constituted of ions and electrons with very particular properties.

In the framework of SHANEL, a joint Franco-German research project financed for Onera by the DPAC [ Aeronautic Civil Programs Agency], specialists in aerodynamics at Onera used the in-house" software package elsA to calculate the blade-vortex interactions on a rotor [rotor Bo 105] during descent flight. A grid of 31 million points was needed in order to calculate the flow domain. "

Onera and the Optical Institute have just obtained the first visible spectral image using an airborne camera that they made. This has enabled them to take a position in the hyperspectral imaging field.

Before launch, the French navy's ships are tested in wind tunnels to define their conditions of use.

Leosphere, a company specializing in atmospheric measurements, has been working together with Onera since its creation. This collaboration is so close that a researcher from the organization has joined the SME.

Drones seem to be more suitable for certain dangerous, long or routine missions than manned machines. But they must be able to take certain correct decisions according to the conditions they encounter. This is the purpose of the ReSSAC project.

When a wall incurves abruptly, as the rear glass of a car does, the flow is not able to follow the shape of the wall and separates from it: there is flow detachment. Flow separation is involved in many aeronautic applications. The flight domain of an aircraft as well as the working limits of its engines can be limited by this phenomena. That is why studies focus on understanding and predicting flow detachment.

A viscous coating can be used to visualize the current lines on the surface of a model surrounded by a flow. These lines are also called friction lines.