Results 221 to 230 of about 1,760,515 (295)
Some of the next articles are maybe not open access.
Evaluating tonal noise in the outdoor environment
The Journal of the Acoustical Society of America, 2023Most outdoor noise criteria are based on the overall A-weighted sound pressure level evaluated at one or more location(s) on the receiving property. The maximum allowable sound pressure level is usually based on the zoning or actual use of the source and receiving properties.
J. Lilly
openaire +2 more sources
Radiation Modes of Propeller Tonal Noise
Journal of Vibration and Acoustics, 2021Abstract This paper focuses on the radiation modes and efficiency of propeller tonal noise. The thickness noise and loading noise model of propellers has been formulated in spherical coordinates, thereby simplifying numerical evaluation of the integral noise source. More importantly, the radiation field can be decomposed and projected to
Jiang, Hanbo +6 more
openaire +3 more sources
On the balance between the tonal and broadband noise of isolated propellers
International Journal of AeroacousticsThis study presents a predominantly numerical and theoretical investigation into the balance of tonal and broadband noise due to an isolated propeller in uniform motion. The predicted trends in the balance between tonal and broadband noise radiation with
Chaitanya Paruchuri +2 more
exaly +2 more sources
Tonal noise reduction by unevenly spaced blades in a forward-curved-blades centrifugal fan
Applied Acoustics, 2019Tonal noise is an essential characteristic of the noise generated from a forward-curved-blades centrifugal fan. Herein, methods to unevenly arrange blades, in particular, a random modulation method, were studied to weaken the undesired tonal noise and ...
Jun Wang, Xiaopei Yang, Boyan Jiang
exaly +2 more sources
Numerical Prediction of Tonal Noise in Centrifugal Blowers
Volume 1: Aircraft Engine; Fans and Blowers; Marine, 2018Centrifugal blowers are widely used in automotive, heating, ventilating, air-conditioning and other industrial purposes. In fact, they allow high-pressure increase to a moderately high mass flow rate, despite the reduced overall dimensions of the system.
Cravero C., Marsano D.
openaire +3 more sources
Sweep Effects on Slat Tonal Noise
AIAA JournalWall-resolved large-eddy simulations (WRLES) are performed for the 30P30N high-lift configuration using a novel, self-developed high-order flux reconstruction (FR) solver. This study presents several key innovations, including the implementation of a computationally efficient setup that achieves fourth-order accuracy and successfully demonstrates the ...
Keli Zhang +4 more
openaire +2 more sources
TONAL NOISE MITIGATION ON WIND TURBINES
24th International Conference on Sound and Vibration 2017, London CallingJM STAUBER, BA MARMO, D BLACK
openaire +2 more sources
Effect of wavy leading edges on airfoil tonal noise
The Physics of Fluids, 2023This work presents numerical studies on the effect of wavy leading edges on airfoil instability tonal noise. Large eddy simulations are conducted for NACA0012 (National Advisory Committee for Aeronautics) airfoils with straight and wavy leading edges ...
Weijie Chen +4 more
semanticscholar +1 more source
Identification of Discrete Tonal Noise in Inclined Jet Impingement Using Pressure-Sensitive Paint
AIAA Journal, 2023This paper presents the utilization of fast-responding pressure-sensitive paint (fast PSP) to identify the discrete tonal noise generated in 55 deg inclined jet impingement. Cases of subsonic ([Formula: see text]) and supersonic ([Formula: see text]) jet
Xu Liu +5 more
semanticscholar +1 more source
Effect of Mach number on the aeroacoustic feedback loop generating airfoil tonal noise
The Physics of Fluids, 2022Airfoil tonal noise emission at low-to-moderate Reynolds number and flow conditions featuring a laminar separation bubble close to the trailing edge is often related to an aeroacoustic feedback mechanism and, therefore, the Mach number is a primary ...
S. Pröbsting +5 more
semanticscholar +1 more source