García-Raffi, LM.; Salmerón-Contreras, L.; Herrero-Durá, I.; Picó Vila, R.; Redondo, J.; Sánchez Morcillo, VJ.; Staliunas, K.... (2018). Broadband reduction of the specular reflections by using sonic crystals: A proof of concept for noise mitigation in aerospace applications. Aerospace Science and Technology. 73:300-308. https://doi.org/10.1016/j.ast.2017.11.048
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/149638
Title:
|
Broadband reduction of the specular reflections by using sonic crystals: A proof of concept for noise mitigation in aerospace applications
|
Author:
|
García-Raffi, L. M.
Salmerón-Contreras, L.J.
Herrero-Durá, Iván
Picó Vila, Rubén
Redondo, Javier
Sánchez Morcillo, Víctor José
Staliunas, Kestutis
Adkins, N.J.
Cebrecos, Alejandro
Jimenez, Noe
Romero García, Vicente
|
UPV Unit:
|
Universitat Politècnica de València. Instituto Universitario de Matemática Pura y Aplicada - Institut Universitari de Matemàtica Pura i Aplicada
Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada
Universitat Politècnica de València. Departamento de Matemática Aplicada - Departament de Matemàtica Aplicada
Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular
|
Issued date:
|
|
Abstract:
|
[EN] The broadband reduction of the specular reflections by sonic crystals (SCs) is theoretically and experimentally reported in this work. The analysed system consists of a sound source radiating a SC made of acoustically ...[+]
[EN] The broadband reduction of the specular reflections by sonic crystals (SCs) is theoretically and experimentally reported in this work. The analysed system consists of a sound source radiating a SC made of acoustically rigid scatterers embedded in water partially covering an open cavity. By comparison with a reference flat reflector, we observe that reflected waves spread in space as a consequence of the spatially modulated properties of the SC. Moreover, due to the different working frequency ranges of the SC a significant noise reduction is produced in a broadband region. Therefore, due to the spreading of the reflected waves, the system produces a broadband noise reduction in the area of the source. In particular, the noise reduction is close to 2 dB for the two octaves emitted by our source, which represents a decrease of 37% of the acoustic energy. The results shown in this work constitute a proof of concept for the use of SCs as broadband-noise reduction systems at the launch pad. An approach to the geometry of the Vega launch vehicle the European Space Agency is proposed and the limitations of the study are discussed. (C) 2017 Elsevier Masson SAS. All rights reserved.
[-]
|
Subjects:
|
Sonic crystals
,
Noise reduction
,
Diffusion
,
Insertion loss
,
Reflection
|
Copyrigths:
|
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
|
Source:
|
Aerospace Science and Technology. (issn:
1270-9638
)
|
DOI:
|
10.1016/j.ast.2017.11.048
|
Publisher:
|
Elsevier
|
Publisher version:
|
https://doi.org/10.1016/j.ast.2017.11.048
|
Project ID:
|
info:eu-repo/grantAgreement/MINECO//FIS2015-65998-C2-1-P/ES/ONDAS DE LUZ EN CRISTALES, MEDIOS ESTRUCTURADOS Y METAMATERIALES/
info:eu-repo/grantAgreement/ESA//ESA ITT 1-7094/
info:eu-repo/grantAgreement/ESA//2441-2015/
info:eu-repo/grantAgreement/MINECO//FIS2015-65998-C2-2-P/ES/ONDAS ACUSTICAS EN CRISTALES, MEDIOS ESTRUCTURADOS Y METAMATERIALES/
|
Thanks:
|
Authors acknowledge the support of the European Space Agency under contract "Sonic Crystals For Noise Reduction At The Launch Pad", ESA ITT 1-7094 (ITI) and the 441-2015 Co-Sponsored PhD "Acoustic Reduction Methods for the ...[+]
Authors acknowledge the support of the European Space Agency under contract "Sonic Crystals For Noise Reduction At The Launch Pad", ESA ITT 1-7094 (ITI) and the 441-2015 Co-Sponsored PhD "Acoustic Reduction Methods for the Launch Pad". The work was supported by Spanish Ministry of Economy and Innovation (MINECO) and European Union FEDER through project FIS2015-65998-C2-1 and FIS2015-65998-C2-2.
[-]
|
Type:
|
Artículo
|