PSJ - engine jet noise reduction (OSCAR)... OSCAR, where the Plasma Synthetic Jet is studied to reduce engine jet noise on take-off by manipulating the mixing zone, with ONERA self-funding :...
One can coarsely separate them in two components, which are (1) the airframe noise and (2) the engine noise.... In the case of a traditional turbojet, engine noise (2) integrates mainly the jet noise (due to the fast hot gas ejection by the nozzle), and the fan noise (due to the fluid / structure interactions generated by the rotating blades feeding the secondary duct)....
