| Measured wavenumber: frequency spectrum associated with acoustic and aerodynamic wall pressure fluctuations. | |
| | |
MedLine Citation:
|
PMID: 20968337 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
Direct measurements of the wavenumber-frequency spectrum of wall pressure fluctuations beneath a turbulent plane channel flow have been performed in an anechoic wind tunnel. A rotative array has been designed that allows the measurement of a complete map, 63×63 measuring points, of cross-power spectral densities over a large area. An original post-processing has been developed to separate the acoustic and the aerodynamic exciting loadings by transforming space-frequency data into wavenumber-frequency spectra. The acoustic part has also been estimated from a simple Corcos-like model including the contribution of a diffuse sound field. The measured acoustic contribution to the surface pressure fluctuations is 5% of the measured aerodynamic surface pressure fluctuations for a velocity and boundary layer thickness relevant for automotive interior noise applications. This shows that for aerodynamically induced car interior noise, both contributions to the surface pressure fluctuations on car windows have to be taken into account. |
| | |
Authors:
|
Blandine Arguillat; Denis Ricot; Christophe Bailly; Gilles Robert |
Related Documents
:
|
9228817 - Tongue surface displacement during bilabial stops. 16846147 - A time-space decomposition method for calculating the nearfield pressure generated by a... 7162157 - Acoustical characteristics of intended syllabic stress in excellent esophageal speakers. 12117347 - Downsizing of voice prosthesis diameter in patients with laryngectomy: an in vitro study. 500257 - Comparison of hemodynamic effects induced by pentaformilgitoxin and deslanoside in pati... 3356117 - Effect of infusion pump fill-stroke flow interruption on response to sodium nitroprussi... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: The Journal of the Acoustical Society of America Volume: 128 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Oct |
Date Detail:
|
Created Date: 2010-10-25 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
|
Languages: eng Pagination: 1647-55 Citation Subset: IM |
Affiliation:
|
Research Department Acoustics Group, TCR AVA 1 63, 1 Avenue du Golf, 78288 Guyancourt, France. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The extended Fourier pseudospectral time-domain method for atmospheric sound propagation.
Next Document: An iterative algorithm for computing aeroacoustic integrals with application to the analysis of free...