Results 41 to 50 of about 595 (186)

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

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

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

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

Aerodynamic Performance Investigation of a Biomimetic‐Based Small‐Scale Horizontal‐Axis Wind Turbine: An Experimental Analysis

Wind Energy, Volume 28, Issue 7, July 2025.
ABSTRACT As the demand for power increases, installing small‐scale wind turbines can be an alternative solution. However, the main challenge for their implementation is the aerodynamic noise. With a view to minimizing noise, this study focuses on the performance investigation of a small‐scale horizontal‐axis wind turbine with NACA 4412 blades inspired ...
Hasan Muhommod Robin, Mim Mashrur Ahmed, Md. Rabiul Islam Sarker, Md. Nahid Hasan, Mahadi Hasan Masud   +4 more
wiley   +1 more source

Experimental Investigation of Rotor Noise in Reverse Non-Axial Inflow

Aerospace
This paper experimentally characterises the far-field noise emissions of a rotor operating in reverse non-axial inflow conditions. Specifically, experiments were undertaken at a range of rotor tilting angles and inflow velocities to investigate the ...
Liam Hanson, Leone Trascinelli, Bin Zang, Mahdi Azarpeyvand   +3 more
doaj   +1 more source

Microcylinder and Slot Combination for Flow Separation Control Over a Wind Turbine Airfoil

Wind Energy, Volume 28, Issue 7, July 2025.
ABSTRACT This study explores a novel passive flow control strategy combining a microcylinder and slot configuration to mitigate flow separation over an S809 wind turbine airfoil under stall conditions at a Reynolds number of 106. Numerical simulations are conducted using the Reynolds‐averaged Navier–Stokes (RANS) approach. The primary objectives are to
Sami Bouterra, Riyadh Belamadi, Abdelouaheb Djemili, Adrian Ilinca   +3 more
wiley   +1 more source