elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Correlation analysis between the jet exhaust velocity field and microphone-array acoustic measurements for a turbo-fan engine

Bassetti, Alessandro and Berkefeld, Tobias and Schröder, Andreas and Siller, Henri and Wrede, Björn (2016) Correlation analysis between the jet exhaust velocity field and microphone-array acoustic measurements for a turbo-fan engine. SciTec Forum and Exhibition, 4.-8. Jan. 2016, San Diego.

[img] PDF
11MB

Abstract

Simultaneous flow and acoustic measurements have been acquired for an aircraft, during ground operation. Measurements of velocity field data with stereoscopic particle image velocimetry (SPIV) on the engine-exhaust jet are correlated with the acoustic-pressure signals of a 120 microphone linear array. The turbulent velocity and the applied-stress components of the Lighthill- and Lilley-analogy source terms in the SPIV region are correlated with the microphone array. Convection effects on the propagating sound waves are neglected in the present study. The self-noise term in the Lighthill quadrupole, shows a hot spot for the correlation in the by-pass to ambient shear layer. This high correlation region is clearly visible in one of the analysed test points only, while in general a poor statistical convergence seems to affect the test-source correlation.

Item URL in elib:https://elib.dlr.de/109467/
Document Type:Conference or Workshop Item (Speech)
Title:Correlation analysis between the jet exhaust velocity field and microphone-array acoustic measurements for a turbo-fan engine
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bassetti, AlessandroAlessandro.Bassetti (at) dlr.deUNSPECIFIED
Berkefeld, Tobiastobias.berkefeld (at) dlr.deUNSPECIFIED
Schröder, AndreasAndreas.Schroeder (at) dlr.deUNSPECIFIED
Siller, HenriHenri.Siller (at) dlr.deUNSPECIFIED
Wrede, BjörnBjoern.Wrede (at) dlr.deUNSPECIFIED
Date:January 2016
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Jet Noise, Acoustic Analogy, Causality Correlation, Microphone Array, PIV
Event Title:SciTec Forum and Exhibition
Event Location:San Diego
Event Type:international Conference
Event Dates:4.-8. Jan. 2016
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Berlin-Charlottenburg , Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Bassetti, Alessandro
Deposited On:04 Jan 2017 11:41
Last Modified:31 Jul 2019 20:06

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.