Results 1 to 10 of about 228,844 (310)

Jet Noise in Airframe Integration and Shielding

open access: yesApplied Sciences, 2020
This paper reviews and presents new results on the effect of airframe integration and shielding on jet noise. Available experimental data on integration effects are analyzed.
Saman Salehian, Reda Mankbadi
doaj   +3 more sources

The Impact of Acoustic Synthetic Jet Actuator Parameters on the Generated Noise [PDF]

open access: yesMicromachines
Synthetic jet actuators are becoming increasingly popular for enhancing electronic heat transfer. However, their use is currently limited due to the high noise they generate. This article examines how actuator parameters (orifice diameter, orifice length
Emil Smyk, Michał Stopel
doaj   +2 more sources

A phenomenological approach to jet noise: the two-source model [PDF]

open access: yesPhilosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2019
Christopher Tam
exaly   +2 more sources

Modelling of jet noise: a perspective from large-eddy simulations [PDF]

open access: yesPhilosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2019
Guillaume A Brès, Sanjiva K Lele
exaly   +2 more sources

Localization of Noise Sources in Jets Flowing from Lobed Nozzles [PDF]

open access: yesE3S Web of Conferences, 2023
The noise of jets formed using conical and lobed nozzles has been measured. The possibility of jet noise reduction by using a lobed nozzle shape has been demonstrated.
Khramtsov Igor   +2 more
doaj   +1 more source

Active Jet Noise Control of Turbofan Engine Based on Explicit Model Predictive Control

open access: yesApplied Sciences, 2022
The active jet noise control received significant attention due to the little influence it has on the engine performance. The active jet noise control is a multivariable problem because it needs to achieve the simultaneous closed-loop control of jet ...
Runmin Ji, Xianghua Huang, Xiaochun Zhao
doaj   +1 more source

On the Fundamental Possibility of a Supersonic Civil Aircraft to Comply with ICAO Noise Requirements Using Existing Technologies

open access: yesAerospace, 2022
Compliance with environmental protection regulations, in particular, community noise requirements, constitutes one of the major obstacles for designing future supersonic civil aircraft.
Victor F. Kopiev   +4 more
doaj   +1 more source

A Numerical Simulation of the Underwater Supersonic Gas Jet Evolution and Its Induced Noise

open access: yesApplied Sciences, 2023
To explore the complex flow field and noise characteristics of underwater high-speed gas jets, the mixture multiphase model, large eddy simulation method, and Ffowcs Williams–Hawking (FW–H) acoustic model were used for simulations, and the numerical ...
Wei Yu, Baoshou Wang, Chun Zhang
doaj   +1 more source

Acoustic shielding and interaction effects for strongly heated supersonic twin jets

open access: yesAIP Advances, 2021
The effects of jet interactions and acoustic shielding on the noise of strongly heated supersonic twin jets are studied using large-eddy simulations.
P. Pineau, C. Bogey
doaj   +1 more source

Sound power and acoustic efficiency of an installed GE F404 jet engine [PDF]

open access: yesJASA Express Letters, 2023
Classical jet noise theory indicates that radiated sound power is proportional to the jet velocity raised to the eighth and third powers for subsonic and supersonic jets, respectively.
Matthew A. Christian   +4 more
doaj   +1 more source

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