FQUROH Project
A Flight Demonstration Project for Airframe Noise Reduction Technology
The FQUROH (Flight demonstration of Quiet technology to Reduce Noise from High-lift configuration) project, whose name comes from the Japanese word for a silently-flying bird, an owl, aims to demonstrate noise reduction technologies for the airframe noise through flight tests using aircraft with modified high-lift devices and modified landing gear.
A large volume of airframe noise from current commercial aircraft is generated from high-lift devices (flaps and slats) and landing gear. The project intends to verify the feasibility of practical noise reduction concepts for them and design methods based on advanced computational simulations.
JAXA has been studying airframe noise and its reduction in cooperation with Japanese aircraft industries, universities and foreign research institutes. Its research activities extend from basic studies to practical technology development: fundamental computational and experimental methods, studies on physics of noise generation, and creation of noise reduction concepts applicable to actual aircraft.
Through these research activities, JAXA has developed practical noise reduction design methods for high-lift devices and landing gear, which are being applied to JAXA’s research aircraft, "Hisho" and a commercial aircraft in the FQUROH project. Flight tests for the modified low-noise "Hisho" are planned in 2016 and 2017. In advance of the flight tests, a phased array microphone system is also being developed for capturing and localizing the noise sources of flying aircraft to evaluate the applied noise reduction designs.
Iso-surface of vorticity magnitude colored by static pressure around JAXA’s landing gear noise evaluation geometry, LEG
Iso-surface of vorticity magnitude colored by static pressure. (Left side is normal flap side-edge and right side is with JAXA’s high-lift wing noise research model, OTOMO2)
The movies of FQUROH Project
More information about FQUROH Project