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Advances in Vibroacoustics and Aeroacustics of Marine, Aerospace and Automotive...
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Advances in Vibroacoustics and Aeroacustics of Marine, Aerospace and Automotive Systems II

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: 20 June 2024 | Viewed by 3613

Special Issue Editors

Prof. Dr. Roberto Citarella

E-Mail Website
Guest Editor
Department of Industrial Engineering, University of Salerno, 84084 Fisciano, Italy
Interests: fracture mechanics; fatigue; bioengineering; vibroacoustics; boundary element method; finite element method; statistical energy analysis; dynamics
Special Issues, Collections and Topics in MDPI journals
Dr. Luigi Federico

E-Mail Website
Guest Editor
Head of Environmental Impact of Air Transport System Dept., Italian Aerospace Research Center (CIRA), Via Maiorise, 81043 Capua, CE, Italy
Interests: vibroacoustics; aeroacoustics; aerospace systems; air traffic management (ATM)
Special Issues, Collections and Topics in MDPI journals
Dr. Venanzio Giannella

E-Mail Website
Guest Editor
Department of Industrial Engineering, University of Salerno, 84084 Fisciano, SA, Italy
Interests: fracture; fatigue; finite element method; vibrations; probabilistic models; simulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The purpose of this Special Issue is to highlight the latest advancements in the abatement of noise and vibrations of marine, aerospace, and automotive systems. The reduction of acoustic emissions and the improvement in cabin interior comfort are on the path of all major industries of the transport system, having a direct impact on customer satisfaction and, consequently, the commercial success of new products. Topics to be covered in this Special Issue deal with computational, instrumentation, and data analysis of noise and vibration of ships, fixed-wing aircrafts, rotating wing aircrafts, space launchers, and automotive vehicles and cover, but are not limited to, aerodynamically generated noise, engine noise, sound absorption, cabin acoustic treatments, duct acoustics, active noise control, and vibroacoustic properties of materials. The Special Issue provides an opportunity for scientists and engineers to publish their studies of current interest, both in the computational and experimental fields of research, and also articles introducing new approaches and methodologies.

The first edition of the Special Issue (10 Papers Published) can be found at: https://www.mdpi.com/journal/applsci/special_issues/Vibroacoustics_Aeroacustics_Automotive.

Prof. Dr. Roberto Citarella
Dr. Luigi Federico
Dr. Venanzio Giannella
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • vibroacoustics
  • aeroacoustics
  • acoustics, noise, vibration, aeronautics, automotive, marine
  • BEM, FEM, SEA

Published Papers (3 papers)

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Research

15 pages, 4362 KiB  
Article
Development and Application of Open Rotor Discrete Noise Prediction Program Using Time-Domain Methods
by Hanyi Wang, Peng Shan and Yicheng Zhou
Appl. Sci. 2024, 14(3), 1138; https://doi.org/10.3390/app14031138 - 29 Jan 2024
Viewed by 649
Abstract
The aerodynamic noise of an open rotor is one of the critical challenges that must be considered in its design and application. FODNOPP, a program specifically programmed to predict the aerodynamic discrete noise of single- and counter-rotating open rotors (such as propellers, propfans, [...] Read more.
The aerodynamic noise of an open rotor is one of the critical challenges that must be considered in its design and application. FODNOPP, a program specifically programmed to predict the aerodynamic discrete noise of single- and counter-rotating open rotors (such as propellers, propfans, and rotorcraft rotors) at subsonic, transonic, and supersonic helical blade tip speeds, has recently been developed by the first author. This program is composed of four prediction codes, namely code a1, code a2, code b, and code c, each based on Farassat-derived formulations Formu 1-RTE, Formu 1A, Formu 1-Sph, and Formu 3, providing time-domain solutions to the Ffowcs Williams–Hawkings equation. Four verification examples for both propeller low-speed flight noise and counter-rotating propfan take-off noise are presented, along with an application case for transonic helical tip speed counter-rotating propfan cruise noise. The results demonstrate the accuracy of FODNOPP in calculating the noise for these verification cases. And in the counter-rotating propfan cruise noise case, the maximum harmonic sound pressure level of the rear propfan is 5.5 dB higher than that of the front propfan. FODNOPP can be referred to as a comprehensive design tool, and it offers valuable guidance for engineering design focused on rotor-related noise reduction. Full article
(This article belongs to the Special Issue Advances in Vibroacoustics and Aeroacustics of Marine, Aerospace and Automotive Systems II)
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14 pages, 2639 KiB  
Article
Hybrid Rocket Engine Noise: Measurements and Predictions of Acoustic Environments from Horizontal Static Fire
by Giovanni Fasulo, Luigi Federico, Adolfo Sollazzo, Luciano De Vivo and Roberto Citarella
Appl. Sci. 2023, 13(15), 9041; https://doi.org/10.3390/app13159041 - 07 Aug 2023
Viewed by 1484
Abstract
A rocket’s turbulent jet radiates intense acoustic waves, which are an acoustic load for structural components like payload, launch structure, and rocket avionics, and impact communities near the launch site. Therefore, a careful characterization of the acoustic field produced by a rocket engine [...] Read more.
A rocket’s turbulent jet radiates intense acoustic waves, which are an acoustic load for structural components like payload, launch structure, and rocket avionics, and impact communities near the launch site. Therefore, a careful characterization of the acoustic field produced by a rocket engine can provide crucial information during the design phase. In particular, this deals with improving the understanding of the acoustics of low-thrust hybrid rocket engines. Since an accurate jet noise detection around the entire launch site is time-consuming and extremely cost-prohibitive, a fast and reliable predictive tool is invaluable. For this purpose, a semi-empirical model was employed, using the exhaust plume property and geometric characteristics of the nozzle as input. Experimental data collected during a firing test campaign, conducted in the framework of HYPROB-NEW project by the Italian Aerospace Research Center, were decisive to discuss the validity of the model also for low-thrust hybrid propulsion and support the goodness of the noise curves and metrics estimated for nearby regions and provide considerations about the implications of engine geometric characteristics on noise emissions. Full article
(This article belongs to the Special Issue Advances in Vibroacoustics and Aeroacustics of Marine, Aerospace and Automotive Systems II)
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22 pages, 3828 KiB  
Article
Vibroacoustic Transfer Characteristics of Underwater Cylindrical Shells Containing Complex Internal Elastic Coupled Systems
by Shuqing Liu, Rui Huo and Likang Wang
Appl. Sci. 2023, 13(6), 3994; https://doi.org/10.3390/app13063994 - 21 Mar 2023
Cited by 1 | Viewed by 1013
Abstract
Cylindrical shells containing complex elastic coupling systems are the main structural form of underwater vehicles. Therefore, in this paper, the vibroacoustic radiation problem of underwater cylindrical shells containing complex internal elastic coupling systems is studied. Firstly, the dynamics model of the complex elastic [...] Read more.
Cylindrical shells containing complex elastic coupling systems are the main structural form of underwater vehicles. Therefore, in this paper, the vibroacoustic radiation problem of underwater cylindrical shells containing complex internal elastic coupling systems is studied. Firstly, the dynamics model of the complex elastic coupled system is established through the method of integrated conductivity. The sound pressure distribution law and the general magnitude relationship between the performance index of hydroacoustic radiation and vibration isolation are investigated through numerical simulation. A strategy of global sensitivity analysis and related parameter optimization is carried out, by applying the Sobol’ method to the dynamics model. It could be concluded that the main flap of sound pressure at low and medium frequencies appears in the direction of the excitation force or the perpendicular to the excitation force, the magnitudes correspondence between the vibration level drop—power flow—hydroacoustic radiation at low frequencies can be expressed as a relatively simple function, and the vibroacoustic transmission of the system at lower order resonance frequencies is dominated by the parameter configuration of the vibration isolation device, while at higher frequencies is more influenced by the modalities of the base structure. The transfer power flow and the level drop are used as objective functions to optimise the acoustic radiation index of the coupled system, with the best results obtained when the transfer power flow and the level drop are used together as objective functions. Full article
(This article belongs to the Special Issue Advances in Vibroacoustics and Aeroacustics of Marine, Aerospace and Automotive Systems II)
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