About the POD application for separating acoustic and turbulent fluctuations from wall pressure synthesised field
by Eric Gaudard; Philippe Druault; Régis Marchiano; François Van Herpe
International Journal of Aerodynamics (IJAD), Vol. 4, No. 1/2, 2014

Abstract: A turbulent flow developing over rigid surface generates two types of excitation loadings: a turbulent flow component that directly impacts the plate and an acoustic component that originates in turbulent flow. The analysis of these loadings is of particular interest especially for future noise reduction strategy implementation in an automobile context. To reproduce acoustic and turbulent fields, a synthesis of random pressure field is proposed thanks to Corcos's model and a diffuse acoustic field. One then proposes to evaluate the ability of proper orthogonal decomposition to discriminate both parts of this synthesised field. Such POD application demonstrates that it acts as a filtering technique in the wavenumber space. But in present study, the acoustic component is shared by multiple POD modes, and therefore cannot be extracted directly. It is also emphasised that such application depends on the frequency resolution and the energy repartition of the synthesised field.

Online publication date: Sat, 05-Jul-2014

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Aerodynamics (IJAD):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?


Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com