User's manual for UCAP: Unified Counter-Rotation Aero-Acoustics Program [PDF]
This is the user's manual for the Unified Counter-rotation Aeroacoustics Program (UCAP), the counter-rotation derivative of the UAAP (Unified Aero-Acoustic Program).
Culver, E. M., Mccolgan, C. J.
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Aeroacoustics of advanced propellers [PDF]
The aeroacoustics of advanced, high speed propellers (propfans) are reviewed from the perspective of NASA research conducted in support of the Advanced Turboprop Program.
Groeneweg, John F.
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Effect of boattail geometry on the acoustics of parallel baffles in ducts [PDF]
Sound attenuation and total pressure drop of parallel duct baffles incorporating certain boattail geometries were measured in the NASA Ames Research Center 7- by 10-Foot Wind Tunnel.
Dudley, M. R. +2 more
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Railway Line Occupancy Control Based on Distance Determination Sound Method. [PDF]
Sensors (Basel), 2022 Burdzik R, Celiński I, Kłaczyński M.
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Analytical simulation of the far-field jet noise and the unsteady jet flow-field by a model of periodic shedding of vortex ring from the jet exit [PDF]
The construction of a theoretical flow field due to shedding of vortex rings, the identification of the controlling parameters, and the determination of whether the theoretical model successfully simulated the unsteady pressure field near jet (and ...
Liu, C. H.
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Simulation-Based Assessment of a Full-Scale Installed Quiet Landing Gear [PDF]
Full-scale simulations of a Gulfstream G-III aircraft, performed in support of the NASA Acoustic Research Measurements flights, are presented to complement results discussed in earlier studies.
Duda, Benjamin +2 more
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Unsteady-flow-field predictions for oscillating cascades [PDF]
The unsteady flow field around an oscillating cascade of flat plates with zero stagger was studied by using a time marching Euler code. This case had an exact solution based on linear theory and served as a model problem for studying pressure wave ...
Huff, Dennis L.
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A Simplified Linearized Lattice Boltzmann Method for Acoustic Propagation Simulation. [PDF]
Entropy (Basel), 2022 Song Q +5 more
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On the Use of Acoustic Wind Tunnel Data for the Simulation of sUAS Flyover Noise [PDF]
Acoustic measurements of a small, unmanned aerial system were recently acquired during a ground test campaign. The purposes of the ground test, conducted in the NASA Langley Low Speed Aeroacoustic Wind Tunnel, were to characterize the source noise in ...
Pettingill, Nicole A. +2 more
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