Results 51 to 60 of about 595 (186)
FluidsIn aerospace, flow control techniques have improved the separation flow characteristics around airfoils by various means. In this paper, the delayed detached eddy simulation (DDES) technique is used to simulate the detailed flow field around the NACA0021
Zelin Liu, Kaidi Li, Xiaojing Sun
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Sound Synthesis of Objects Swinging through Air Using Physical Models
Applied Sciences, 2017 A real-time physically-derived sound synthesis model is presented that replicates the sounds generated as an object swings through the air. Equations obtained from fluid dynamics are used to determine the sounds generated while exposing practical ...
Rod Selfridge +2 more
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Continuous Adjoint to Proudman's Formula for Aeroacoustic Shape Optimization
International Journal for Numerical Methods in Fluids, Volume 97, Issue 6, Page 966-984, June 2025.This paper presents a cost‐efficient framework for aeroacoustic shape optimization by developing the adjoint to Proudman's formula, coupled with the steady‐state RANS equations and the k‐ ω$$ \omega $$ SST turbulence model. The aeroacoustic model and the adjoint solver are initially validated/verified with experimental data/finite differences, before ...
M. Erfan Farhikhteh +2 more
wiley +1 more source
Near-Field Pressure Signature of New-Concept Supersonic Aircraft Obtained Using Open-Source Approach
SciThis study investigates the numerical prediction of the sonic boom phenomenon in supersonic aircraft by evaluating the near-field pressure signatures of three different aeroshapes.
Antimo Glorioso +3 more
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Aerospace, 2015 Air traffic is growing at a steady rate of 3% to 5% per year in most regions of the world, implying a doubling every 15–25 years. This requires major advances in aircraft noise reduction at airports, just not to increase the noise exposure due to the ...
Luís M. B. C. Campos
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Theoretical and numerical method in aeroacoustics [PDF]
INCAS Bulletin, 2010 The paper deals with the mathematical and numerical modeling of the aerodynamic noisegenerated by the fluid flow interaction with the solid structure of a rotor blade.Our analysis use Lighthill’s acoustic analogy.
Nicuşor ALEXANDRESCU +1 more
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Development and validity of type II sulcus vocalis in excised canine larynx
World Journal of Otorhinolaryngology - Head and Neck Surgery, Volume 11, Issue 2, Page 276-280, June 2025.Abstract Objectives This study aims to develop a sulcus vocalis model in the excised canine larynx and to investigate the validity of the model. Methods Type II sulcus vocalis was created by continuous intradermal suture in six excised canine larynges.
Ting Gong +6 more
wiley +1 more source
Acoustic Experiments for Special Forces Helicopter Operations
AerospaceFor military missions, the helicopter is a versatile aircraft with many benefits. However, the high levels of noise radiation enable large acoustic detection ranges. For mission success, knowledge of acoustic radiation and propagation is paramount.
W. F. J. Olsman
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Theoretical Foundation of Rapid Distortion Theory on Transversely Sheared Mean Flows
Fluids, 2020 The focus of this paper is on Rapid Distortion Theory on transversely sheared mean flows, which is often used to investigate turbulence-solid surface interactions.
Marvin E. Goldstein
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Spatiotemporal optical vortex reconnections of loop vortices
Nanophotonics, Volume 14, Issue 6, Page 729-739, April 2025.Abstract Reconnections of spatiotemporal optical vortices have been shown to occur between line vortices. Here, we show that reconnections also occur between spatiotemporal loop vortices in optical waves. As optical loop vortices propagate in a media with spatial diffraction and material group velocity dispersion, unique reconnections occur.
Jordan Adams, Andy Chong
wiley +1 more source