Results 51 to 60 of about 6,303 (162)

Tutorial Overview: Numerical Synergy in Muffler Acoustic Design A Critical Comparison of TMM, FEM, and CFD Approaches for Transmission Loss Quantification

Engineering Reports, Volume 8, Issue 1, January 2026.
Experimental measurements reveal distinct performance boundaries: TMM achieves rapid convergence (< 2 dB error below 2000 Hz) but neglects 3D wave effects; FEA maintains < 10% deviation up to 3500 Hz with 90% reduced computational cost versus CFD; while transient CFD captures broadband attenuation trends despite 10× higher resource demands.
Bin Fang, Tong Wei, Yi Yang, Xintie Wang
wiley   +1 more source

Plasma Actuators for Energy‐Efficient Aerodynamic Flow Control: A Review of Modeling Approaches

International Journal of Aerospace Engineering, Volume 2026, Issue 1, 2026.
Plasma actuators are innovative devices employed for aerodynamic flow control, functioning based on magnetohydrodynamic principles to manipulate electrically conductive fluid flows around components such as airfoils, cylinders, wind turbine blades, and vehicles.
Sarallah Abbasi, Mohammad Amin Daraee, Abazar Abadeh, Mohammad Rezwan Habib   +3 more
wiley   +1 more source

The effects of viscosity on sound radiation near solid surfaces

, 2011
Although the acoustic analogy developed by Lighthill, Curle, and Ffowcs Williams and Hawkings for sound generation by unsteady flow past solid surfaces is formally exact, it has become accepted practice in aeroacoustics to use an approximate version in ...
S. V. Sorokin, G. Gabard, C. L. Morfey, Morfey, C.L., Sorokin, Sergey, Gabard, G., Sorokin, S.V.   +6 more
core   +1 more source

Optimization of Noise‐Reducing Orifices in Natural Gas Pressure‐Regulating Valves Based on a Query‐by‐Committee Kriging Model

Modelling and Simulation in Engineering, Volume 2026, Issue 1, 2026.
The quest for optimal noise‐reduction orifice plates in natural gas pressure regulating valves is often constrained by a fundamental dilemma: high‐fidelity fluid‐acoustic simulations, although accurate, impose prohibitive computational costs that render conventional optimization approaches impractical.
Wen Sun, Yuhui Gao, Weili Tao, Wei Zeng, Smritijit Sen   +4 more
wiley   +1 more source

Enhancing Energy Generation While Mitigating Noise Emissions in Wind Turbines Through Multi‐Objective Optimization: A Deep Reinforcement Learning Approach

Wind Energy, Volume 28, Issue 8, August 2025.
ABSTRACT We develop a torque‐pitch control framework using deep reinforcement learning for wind turbines to optimize the generation of wind turbine energy while minimizing operational noise. We employ a double deep Q‐learning, coupled to a blade element momentum solver, to enable precise control over wind turbine parameters.
Martín Frutos, Oscar A. Marino, David Huergo, Esteban Ferrer   +3 more
wiley   +1 more source

Prediction of vibration response of aircraft panel covered with macro fiber composite patches

Hangkong gongcheng jinzhan
The traditional finite element model has the problems of high computational cost，more black-box operation，and lack of independent intellectual right. The analytical method is used to study the prediction of the vibration response of aircraft wall panels ...
LI Kaixiang, QIAO Zhou, ZHANG Fei, LI Hui, HAN Qingkai   +4 more
doaj   +1 more source

Tonal-Noise Assessment of Quadrotor-Type UAV Using Source-Mode Expansions

Acoustics, 2020
The present work deals with the modeling of the aerodynamic sound generated by the propellers of small-size drones, taking into account the effects of horizontal forward flight with negative pitch and of installation on supporting struts.
Michel Roger, Stéphane Moreau
doaj   +1 more source

State of the Art of Low‐Frequency Acoustic Modulation: Intensity Enhancement and Directional Control

Advanced Science, Volume 12, Issue 27, July 17, 2025.
High intensity low‐frequency sound sources hold significant value in many fields. However, their long wavelength, strong penetrability, and tendency to diffract make direction control and intensity enhancement challenging. Acoustic generators and metamaterial‐based acoustic devices still face issues such as low energy efficiency, poor directional ...
Jingsong Xu, Yunfeng Ye, Tao Dong, Zhaochu Yang, Nuno Miguel Matos Pires, Yu Zhou, Fuyu Tao, Jin Wang, Junshan Zhang, Guoxi Luo, Libo Zhao, Qi Mao, Yangtao Wang, Zhuangde Jiang   +13 more
wiley   +1 more source

Fingertip tactile sensation via piezoelectric micromachined ultrasonic transducers with an amplified interface

Scientific Reports
Tactile devices are often used in the field of robotics; however, the development of compact high-resolution tactile devices remains challenging. In this study, we developed a haptic device for force presentation using a DC motor and a tactile sensation ...
Junji Sone
doaj   +1 more source

Leading-Edge Noise Mitigation on a Rod–Airfoil Configuration Using Regular and Irregular Leading-Edge Serrations

Applied Sciences
Rod–airfoil configurations are commonly used to study turbulence–structure interaction noise, which is a major contributor to aerodynamic noise in various engineering applications.
Mehmet Numan Kaya, Sutharsan Satcunanathan, Matthias Meinke, Wolfgang Schröder   +3 more
doaj   +1 more source