The 9×15 is a significant asset to the nation and the aero-propulsion community because of its unique ability to test large-scale hardware in a continuous subsonic air stream. With the ever-increasing demand for reducing aircraft noise, the importance of the 9×15 is greater than ever. Offering state-of-the-art acoustic capabilities, the facility is a vital part of the nation’s aeronautics research plans. Programs supported in this facility include a variety of commercial aircraft propulsion systems: the High Speed Civil Transport (HSCT), Advanced Tactical Fighter (ATF), Joint Strike Fighter (JSF) and other military short takeoff and vertical landing (STOVL) aircraft applications.
Built in 1968, the test section of the 9×15 is 9 ft high by 15 ft wide and 33 ft long. Providing airspeeds from 0 to 165 mph, this facility has unique and nationally recognized capabilities to evaluate aerodynamic performance and acoustic characteristics of nozzles, inlets and propellers.
The facility is acoustically treated and equipped with microphones linked to a dynamic data system. A series of drive rig systems are available to power engine fan models for performance and acoustic testing. A unique “rotor alone nacelle” test capability allows isolation of “fan alone noise” by elimination of outlet guide vanes.
