Contents

1. About libAcoustics library
2. Available versions of the library
3. Tutorials and examples
4. Published papers related to libAcoustics technology
5. For citation

About libAcoustics library

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The libAcoustics - library for far-field noise computation. At current time contains 3 kind of far-field prediction models:

1. Curle analogy

   Based on equation 3.3 from Curle N. (1955)

2. Ffowcs Williams Hawkings analogy

   • Farassat 1A integral formulation Brentner K. S., & Farassat F. (1998).

   • Wind-tunnel configuration: formulation GT Guillaume Brès et al. (2010)

3. CFD-BEM coupling

Tutorials and examples

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The libAcoustics source code tutorial, which was prepared in Chalmers University

Some examples are presented in the conference paper Epikhin A.(2021)

libAcoustics library Wiki (in progress)

Available versions of the library

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We currently support the library for the OpenFOAM+ versions. Current Release

The library is available for next OpenFOAM versions:

• OpenFOAM 3.0, 4.1 versions of the library are stored in the openfoam-v4.1 branch
• OpenFOAM+ v.1812 version of the library is in the digitef-dev-1812 branch of the repository
• OpenFOAM+ v.1912 version of the library is in the digitef-dev-1912 branch of the repository
• OpenFOAM+ v.2012 version of the library is in the digitef-dev-2012 branch of the repository
• OpenFOAM+ v.2112 version of the library is in the digitef-dev-2112 branch of the repository
• OpenFOAM+ v.2212 version of the library is in the v2212 branch of the repository
• OpenFOAM+ v.2312 version of the library is in the v2312 branch of the repository

Note: Please use the v2012 or v2112 versions because we fixed some bugs in them that were present in earlier implementations.

Published materials related to libAcoustics library

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Title	Description
Investigation of noise reduction effects of individual and combined geometrical modifications on UAM propeller blades: Article
Low-Noise Airfoils for Turbomachinery Applications: Two Examples of Optimization: Article
Hydroacoustics of turbulent flow over superhydrophobic and oscillating cylinders: Article
Evaluation of different FW-H surfaces and modal decomposition techniques for the acoustic analysis of UAV propellers through detached eddy simulations: Article
Numerical investigation of noise suppression and amplification in forced oscillations of single and tandem cylinders in high Reynolds number turbulent flows: Article
Numerical Study of Cavitation Noise Around NACA66 (MOD) Hydrofoil with Direct Volume Integration: Article
AeroSPEED: a high order acoustic solver for aeroacoustic applications: Article
Numerical investigation of splitter plates as noise reduction techniques for tandem cylinders: Article
Comparison of Porous and Direct Volumetric Integration FW-H Formulation for Acoustic Prediction: Article	---
Prediction & Active Control of Multi-Rotor Noise: MSc Thesis
Noise prediction of a single-stream under-expanded jet in OpenFOAM: Article	---
Numerical Simulation of Supersonic Jet Noise Using Open Source Software: Article	---
Evaluation of Synthetic Jet Flow Control Technique for Modulating Turbulent Jet Noise: Article
Numerical Investigation on Aerodynamic Noise of Flow past a Cylinder with Different Spanwise Lengths: Article
Aerodynamic and Acoustic Analysis of Multiple Rotors in Different Configurations: Article	---
Numerical investigation of noise suppression and amplification in forced oscillations of single and tandem cylinders in high Reynolds number turbulent flows
CFD-based Aerodynamic and Aeroacoustic Analysis of Large Payload Multi-Copter Rotors: Article
Simulations of multi-rotor interaction noise at hovering & forward flight conditions: Article	---
Towards a low-noise axial fan for automotive applications: Article
Numerical Study of the Impact of Fluid–Structure Interaction on Flow Noise over a Rectangular Cavity: Article
Validating Confined Flame Noise Simulation Using External Sensor: Article
Numerical Study of Cavitation Noise Around 2-D Hydrofoil with Direct Volume Integration: Article	---
Prediction of the flow and acoustic fields generated by an isolated propeller: Article
Implementation of the FWH aero-acoustic analogy for sector analysis of an axi-symmetric turbomachine: Tutorial
Prediction of infrasound emission from horizontal axus wind turbines: MSc Thesis
Influence of the elastic cavity walls on cavity flow noise: Article
A Computational Study on the Aeroacoustics of a Multi-Rotor Unmanned Aerial System: Article
Numerical Study of Iced Airfoil Aeroacoustics Using IDDES: Article
Wall-modeled large-eddy simulation of a trailing-edge serration–finlet configuration: Article
The Eulerian–Lagrangian Approach for the Numerical Investigation of an Acoustic Field Generated by a High-Speed Gas-Droplet Flow: Article
Jet Noise in Airframe Integration and Shielding: Article
Validation of the developed open-source library for far-field noise prediction: Article
Broadband noise prediction using large eddy simulation and a frequency domain method): Article
The numerical simulation of compressible jet at low Reynolds number using OpenFOAM: Article
Wing airfoil selection and optimization for the tourist class reusable space vehicle: Article	---
Coupled CFD-based Shape Optimization of a Wing of Reusable Space Vehicle of Tourist Class: Article
Transient cavitating flow structure and acoustic analysis of a hydrofoil with whalelike wavy leading edge: Article
A proposed wavy shield for suppression of supersonic jet noise utilizing reflections
Numerical Study of Flow-Induced Noise around Cylinder and Rod-NACA0012 Hydrofoil	---
Simulations of Noise Generated by Rotor-Rotor Interactions at Static Conditions	---
Investigating the Impact of Water Injection on Noise Generation During Rocket Lift-Off	---
Prediction of the Free Jet Noise Using Quasi-gas Dynamic Equations and Acoustic Analogy: Article
Simulations of Broadband Noise of a Small UAV Propeller: Article	---
Analysis Methods and Design Measures for the Reduction of Noise and Vibration Induced by Marine Propellers: Article
Prediction of Noise Associated with an Isolated UAV Propeller: MSc Thesis
High-Fidelity Simulations of Noise Generation in a Propeller-Driven Unmanned Aerial Vehicle: Article	---
Análise e validação de modelo de simulação numérica para previsão de ruído aerodinâmico utilizando OpenFOAM e Libacoustics: MSc Thesis

For citation

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If you have found the software useful for your research, please cite next sources:

• Epikhin, A., Evdokimov, I., Kraposhin, M., Kalugin, M., Strijhak, S. Development of a Dynamic Library for Computational Aeroacoustics Applications Using the OpenFOAM Open Source Package // Procedia Computer ScienceVolume 66, 2015, Pages 150-157 https://www.sciencedirect.com/science/article/pii/S1877050915033670 , DOI: 10.1016/j.procs.2015.11.018

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