NASA is investigating the potential of acoustic shielding as a means to reduce the noise footprint at airport communities. A subsonic transport aircraft and Langley's 14- by 22-foot Subsonic Wind Tunnel were chosen to test the proposed "low noise" technology. The present experiment studies the basic components of propulsion-airframe shielding in a representative flow regime. To this end, a 5.8-percent scale hybrid wing body model was built with dual state-of-the-art engine noise simulators. The results will provide benchmark shielding data and key hybrid wing body aircraft noise data. The test matrix for the experiment contains both aerodynamic and acoustic test configurations, broadband turbomachinery and hot jet engine noise simulators, a...
An experimental investigation was performed to study the propulsion airframe aeroacoustic installati...
A system noise study is presented for the blended-wing-body (BWB) aircraft configured with advanced ...
Experiments on a scale model of an advanced unconventional subsonic transport concept, the Blended W...
One approach toward achieving NASA's aggressive N+2 noise goal of 42 EPNdB cumulative margin below S...
Acoustic and flow-field experiments were conducted on exhaust concepts for the next generation super...
A system noise assessment of a hybrid wing body configuration was performed using NASA’s best availa...
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2009.In...
An aircraft system noise assessment was conducted for a hybrid wing body freighter aircraft concept ...
This investigation was conducted to: (1) Develop a hybrid wing body subsonic transport configuration...
Detailed acoustic measurements of the noise from the leading-edge Krueger flap of a 5.75 percent Hyb...
An Ultrasonic Configurable Fan Artificial Noise Source (UCFANS) was designed, built, and tested in s...
An extensive experimental investigation was performed to study the propulsion airframe aeroacoustic ...
An Ultrasonic Configurable Fan Artificial Noise Source (UCFANS) was designed, built, and tested in s...
Two dual-stream, heated jet, Compact Jet Engine Simulator (CJES) units are designed for wind tunnel ...
Noise shielding benefits associated with an advanced unconventional subsonic transport concept, the ...
An experimental investigation was performed to study the propulsion airframe aeroacoustic installati...
A system noise study is presented for the blended-wing-body (BWB) aircraft configured with advanced ...
Experiments on a scale model of an advanced unconventional subsonic transport concept, the Blended W...
One approach toward achieving NASA's aggressive N+2 noise goal of 42 EPNdB cumulative margin below S...
Acoustic and flow-field experiments were conducted on exhaust concepts for the next generation super...
A system noise assessment of a hybrid wing body configuration was performed using NASA’s best availa...
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2009.In...
An aircraft system noise assessment was conducted for a hybrid wing body freighter aircraft concept ...
This investigation was conducted to: (1) Develop a hybrid wing body subsonic transport configuration...
Detailed acoustic measurements of the noise from the leading-edge Krueger flap of a 5.75 percent Hyb...
An Ultrasonic Configurable Fan Artificial Noise Source (UCFANS) was designed, built, and tested in s...
An extensive experimental investigation was performed to study the propulsion airframe aeroacoustic ...
An Ultrasonic Configurable Fan Artificial Noise Source (UCFANS) was designed, built, and tested in s...
Two dual-stream, heated jet, Compact Jet Engine Simulator (CJES) units are designed for wind tunnel ...
Noise shielding benefits associated with an advanced unconventional subsonic transport concept, the ...
An experimental investigation was performed to study the propulsion airframe aeroacoustic installati...
A system noise study is presented for the blended-wing-body (BWB) aircraft configured with advanced ...
Experiments on a scale model of an advanced unconventional subsonic transport concept, the Blended W...