Results 111 to 120 of about 1,929,704 (249)

Forward acoustic performance of a shock-swallowing high-tip-speed fan (QF-13) [PDF]

Forward noise and overall aerodynamic performance data are presented for a high-tip-speed fan having rotor blade airfoils designed to alter the conventional leading-edge bow shocks to weak, oblique shocks which are swallowed within the interblade ...
Lucas, J. G., Mackinnon, M. J., Woodward, R. P.   +2 more
core   +1 more source

Jet noise suppression by porous plug nozzles [PDF]

Jet noise suppression data presented earlier by Maestrello for porous plug nozzles were supplemented by the testing of a family of nozzles having an equivalent throat diameter of 11.77 cm.
Bauer, A. B., Kibens, V., Wlezien, R. W.
core   +1 more source

Vehicle Aerodynamic Noise: A Systematic Review of Mechanisms, Simulation Methods, and Bio-Inspired Mitigation Strategies. [PDF]

Biomimetics (Basel)
Zou T, Fu Y, Cao P.
europepmc   +1 more source

Metasurface Lossless-Regulation Mechanism of Dynamic Acoustic Mass for Low-Frequency Aerodynamic Noise Control. [PDF]

Materials (Basel)
Li M, Wu J.
europepmc   +1 more source

Bio-inspired helical pantograph arms for aerodynamic noise suppression in high-speed trains. [PDF]

iScience
Lou F, Xiao X, Zhang Z, Zhang J, Li X.
europepmc   +1 more source

Interim noise correlation for some OTW configurations using external jet-flow deflectors [PDF]

Jet flap interaction acoustic data obtained statically from a model-scale study of STOL-OTW configurations with a conical nozzle mounted above the wing and using various external deflectors to provide jet-flow attachment are correlated. The acoustic data
Groesbeck, D. E., Vonglahn, U. H.
core   +1 more source

Owl airfoil aerodynamic noise sources and performance compared to hawk and NACA0012 airfoils for low Reynolds applications. [PDF]

Sci Rep
Kazemi M, Mani M.
europepmc   +1 more source

Analytical Solution and Analysis of Aerodynamic Noise Induced by the Turbulent Flow Interaction of a Plate with Double-Wavelength Bionic Serration Leading Edges. [PDF]

Biomimetics (Basel)
Tian C, Liu X, Wang L, Li Y, Wu Y.
europepmc   +1 more source

Aerodynamic and acoustic performance of ejectors for engine-under-the-wing concepts [PDF]

Subsonic thrust augmentation, exhaust plume velocity contours and acoustic characteristics of a small-scale, 6-tube mixer nozzle with ejector were obtained with and without a wing. Thrust augmentation up to 30 percent was achieved.
Goodykoontz, J. H., Groesbeck, D., Vonglahn, U.   +2 more
core   +1 more source

Aerodynamic noise characteristics of a centrifugal fan in high-altitude environments. [PDF]

PLoS One
Liu X, Liu J.
europepmc   +1 more source