Results 11 to 20 of about 8,352,814 (137)
Aeroacoustic performance of scale model sonic inlets [PDF]
13th Aerospace Sciences Meeting, 1975 Various means can be used to vary engine inlet throat areas in order to reduce noise generated at takeoff and approach. Low-speed wind-tunnel tests were performed to evaluate the aeroacoustic performance of two takeoff geometries (cylindrical centerbody and bulb-shaped centerbody) and four approach geometries (bulb-shaped centerbody, annular ring ...
Abbott, J. M.
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Aerodynamic and aeroacoustic performance of airfoils with morphing structures [PDF]
Wind Energy, 2015 AbstractAerodynamic and aeroacoustic performance of airfoils fitted with morphing trailing edges are investigated using a coupled structure/fluid/noise model. The control of the flow over the surface of an airfoil using shape optimization techniques can significantly improve the load distribution along the chord and span lengths whilst minimising noise
Ai, Qing +3 more
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Aerodynamic and Aeroacoustic Performance of Spanwise Morphed Airfoils [PDF]
AIAA AVIATION 2020 FORUM, 2020 Experimental studies of a NACA 0012 airfoil fitted with six different spanwise morphed flap profiles were successfully carried out to characterize their aerodynamic and aeroacoustic performance. The airfoil was tested with six configurations with different spanwise flap camber with a maximum deflection angle of β = 10◦ on one side and a minimum ...
Kamliya Jawahar, Hasan +2 more
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Polyoptimisation of the Aerodynamic and Aeroacoustic Performance of Aerofoils with Serrated Leading Edges [PDF]
23rd AIAA/CEAS Aeroacoustics Conference, 2017 Recent research confirmed leading edge serrations to be an effective passive noise reduction treatment for aerofoil broadband noise at high-turbulent inflow conditions. Therefore, reducing leading edge broadband noise while maintaining acceptable aerodynamic aerofoil performance represents a pressing task for future applications.
Biedermann, TM +5 more
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Aeroacoustic analysis of main rotor and tail rotor interaction [PDF]
, 2008 The increased restrictions placed on helicopter noise levels over recent decades have encouraged manufacturers to better understand tail rotor noise and its aerodynamic sources.
Fletcher, Timothy M. +5 more
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Aerodynamic and Aeroacoustic Performance of Bio-inspired Flapping Wings [PDF]
, 2022 As the noise generation mechanism and acoustic control strategies for flapping wings remain largely unexplored, a hybrid method coupling the Farassat formulation 1A with the three-dimensional incompressible Navier-Stokes equations is developed to explore the aerodynamic and aeroacoustic performance of flapping wings as well as the effects of passive ...
Ji, Xueyu ; https://orcid.org/
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Aerodynamic and Aeroacoustic Performance of a Wing with Structured Surface Inspired by Owl’s Wings [PDF]
Journal of Applied Fluid Mechanics, 2022 With the advent of various advanced materials, the idea of flying like birds has attracted considerable attention in recent years. In addition, aeroacoustics has become an important issue and is being widely studied.
R. Harbi Monfared +4 more
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Multidisciplinary Optimization Design of Low-Noise Propellers
Aerospace, 2023 In this paper, a multidisciplinary optimization design method and its verification of low-noise aircraft propellers considering aerodynamics, noise, and structural strength were carried out to further reduce the aerodynamic noise of the aircraft ...
Dongwen Xue +3 more
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Aeroacoustic Assessment of Performance of Overtip Liners in Reducing Airfoil Noise [PDF]
AIAA Journal, 2021 The reduction of fan broadband noise in the next generation of ultrahigh-bypass-ratio engines remains a key technology challenge for the foreseeable future.
Sergi Palleja-Cabre +3 more
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Non-negative aeroacoustic source contributions to radiated sound power [PDF]
, 2023 A new approach that determines the contribution of aeroacoustic sources to sound power is presented. The method combines the Lighthill source distribution with an acoustic impedance matrix constructed from radiation kernels of the free-field Green’s ...
Marburg, Steffen +4 more
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