A Simplified Linearized Lattice Boltzmann Method for Acoustic Propagation Simulation [PDF]
Entropy, 2022 A simplified linearized lattice Boltzmann method (SLLBM) suitable for the simulation of acoustic waves propagation in fluids was proposed herein. Through Chapman–Enskog expansion analysis, the linearized lattice Boltzmann equation (LLBE) was first ...
Qiaochu Song +5 more
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Mechanism of Pipeline Leakage Sound Generation and Leak Detection Technology Under Multiple Operational Conditions [PDF]
SensorsAcoustic emission detection technology is widely employed for leakage detection in water supply systems. However, this approach heavily relies on extensive field data to develop feature extraction and analysis models.
Fei Chen +7 more
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Modelling of Flow Characteristics of Main Rotor with Elliptical Root Section in Hover Mode [PDF]
E3S Web of Conferences, 2023 The modelling of a helicopter main rotor flow field in hover regime is being considered. The aerodynamic and aeroacoustics characteristics of two rotor models with different blade root geometries are compared.
Kusyumov Sergey +4 more
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Free and Non-Free Vortex Design for Axial Fans with Circumferential Sweep through CFD Techniques [PDF]
Journal of Applied Fluid Mechanics, 2022 The sound generated by axial flow fans has become increasingly important in several industrial areas. These devices represent considerable noise sources that must be considered from the design stage. The scope of this research work is to present an axial
T. M. Arispe Angulo +4 more
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Fluids, 2023 This paper addresses one of the major obstacles arising in the high-fidelity scale-resolving simulations of turbulent flows inside ducts with the walls covered by acoustic liners in order to attenuate the sound radiated from the duct.
Mikhail Shur +2 more
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An Overview of Hybrid RANS–LES Models Developed for Industrial CFD
Applied Sciences, 2021 An overview of scale-resolving simulation (SRS) methods used in ANSYS Computational Fluid Dynamics (CFD) software is provided. The main challenges, especially when computing boundary layers in large eddy simulation (LES) mode, will be discussed.
Florian Menter +3 more
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Aeroacoustic Simulations of an Axial Fan with Modelled Turbulent Inflow Conditions
International Journal of Turbomachinery, Propulsion and Power, 2023 In applications, the acoustics of fans can differ significantly from the measurements of the standalone fan. This is due to disturbed inflow conditions, for example, caused by a heat exchanger upstream of an axial fan.
Philipp Dietrich, Marc Schneider
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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
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The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein
Applied Sciences, 2021 Dragonfly wings have many excellent functions, such as superhydrophobic, fatigue resistance, anti-reflection, etc. However, there are few reports on the low noise flight of dragonfly wings.
Shan Jiang +6 more
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A Computational Study on the Aeroacoustics of a Multi-Rotor Unmanned Aerial System
Applied Sciences, 2021 The noise generated by a quadrotor biplane unmanned aerial system (UAS) is studied computationally for various conditions in terms of the UAS pitch angle, propellers rotating velocity (RPM), and the UAS speed to understand the physics involved in its ...
Morteza Heydari +2 more
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