After creating the smallest cryogenic infrared camera in the world in late 2011, research engineersatONERA reveal another world first: the sorting of photons by their wavelength, at a micrometric scale. This system revolutionizes the usual trade-offs between sensitivity and full color inherent to standard filtering, since this sorting technique allows all of the incident photons to be retrieved and used, while filtering" loses" photons
It was a case of improving the operability of a TAPS (Twin Annular Pre Swirl) type chamber injection system developed by Snecma, designed to reduce cruising flight NOx emissions by 50 to 60 %. Research engineersatONERA had a double challenge: on one hand, combustion stability and quality when idling and, on other hand, reigniting the engine at high altitude
"By pointing the laser towards the zone that we want to study, we obtain information on the specific speed, that is to say, the speed of the vibrating air molecules, explains Frank Simon, research engineerat the ONERA in Toulouse. However, knowing the acoustic pressure isn't enough, we must combine these measurements with a model of the wave propagation in the air flow, that is to say, an aero-acoustic propagation model
"The rules of the air defined for general aerial circulation assume the presence of a pilot on board who is responsible for the safe execution of the flight" points out Christel Seguin, research engineeratOnera in Toulouse. Drones move in specific airspace known as" segregated"
At water level, the wind's speed is zero and it increases progressively between zero and several dozen meters in height", explained Christophe Verbeke, test engineeratOnera in Lille. Another difference is that in the wind at the boat's level is a combination of the real wind and the boat's speed and is often complex
When he was an optics research engineeratOnera, Didier Rabaud had the opportunity to take part in the NAOS project for the Very Large Telescope in Chile. After this success, he decided to create his own SME, a service provider for companies in the field of new optronics technologies
"We tested several types of films, because we wanted it to be conducting, but not, too much says François Issac, research engineeratOnera Toulouse. "A non- conducting film does not get hot, because it doesn't interact at all with the electromagnetic field
"We are trying to understand the aerodynamics of the blades (air flows around airfoil) and their aeroelasticity (the way in which the structure is deformed by the combined action of the wind and the rotation of the blades), says Marc Rapin, research engineeratOnera. Because this deformation modifies also their aerodynamics." Onera is already interested in this subject, from its work on helicopters
"Virtually all the small aerodromes are under pressure from residents associations who demand limits on flights and the noise they generate", says Claude Le Tallec, engineeratOnera and a flying enthusiast with more than 4 000 hours flying experience. European regulations still tolerate relatively high noise levels but Europe is considering a tightening up the controls