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Multi-scale measurement of acoustic particle velocity and flow velocity for liner investigations

Haufe, Daniel and Fischer, Andreas and Czarske, Jürgen and Schulz, Anita and Bake, Friedrich and Enghardt, Lars (2013) Multi-scale measurement of acoustic particle velocity and flow velocity for liner investigations. Experiments in Fluids, 54 (7). Springer. DOI: 10.1007/s00348-013-1569-4 ISSN 0723-4864

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Abstract

The optimization of liners for noise reduction lacks a thorough comprehension of the inherent aeroacoustic damping phenomena. Therefore, the interaction of the acoustic particle velocity (APV) and the flow velocity field at liners has to be investigated. Hence, the simultaneous measurement of both quantities, differing by several orders of magnitude, is aspired. However, the required high dynamic range is challenging. In order to analyse the energy transfer from the acoustic wave to the flow turbulence, turbulence spectra must be resolved which necessitates a high measurement rate as well. Doppler global velocimetry with sinusoidal laser frequency modulation (FM-DGV) fulfils these demanding requirements. First, the capability of FM-DGV for APV measurements was successfully validated with microphone measurements. Finally, a multi-point measurement at a bias flow liner was performed with a high dynamic range of 7,000 and a high measurement rate of 50 kHz. Hence, a deeper understanding of the aeroacoustics at liners can be gained in future investigations.

Item URL in elib:https://elib.dlr.de/83224/
Document Type:Article
Title:Multi-scale measurement of acoustic particle velocity and flow velocity for liner investigations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Haufe, Danieldaniel.haufe (at) tu-dresden.deUNSPECIFIED
Fischer, AndreasTU DresdenUNSPECIFIED
Czarske, JürgenTU DresdenUNSPECIFIED
Schulz, Anitaanita.schulz (at) dlr.deUNSPECIFIED
Bake, Friedrichfriedrich.bake (at) dlr.deUNSPECIFIED
Enghardt, LarsLars.Enghardt (at) dlr.deUNSPECIFIED
Date:July 2013
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:54
DOI :10.1007/s00348-013-1569-4
Publisher:Springer
ISSN:0723-4864
Status:Published
Keywords:optical measurement, DGV, acoustic particle velocity, bias flow liner
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Fischer, Andre
Deposited On:08 Jul 2013 15:14
Last Modified:10 Jan 2019 15:52

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