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 Nature. 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/ | ||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||
Title: | Multi-scale measurement of acoustic particle velocity and flow velocity for liner investigations | ||||||||||||||||||||||||||||
Authors: |
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Date: | July 2013 | ||||||||||||||||||||||||||||
Journal or Publication Title: | Experiments in Fluids | ||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||
Volume: | 54 | ||||||||||||||||||||||||||||
DOI: | 10.1007/s00348-013-1569-4 | ||||||||||||||||||||||||||||
Publisher: | Springer Nature | ||||||||||||||||||||||||||||
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: | 12 May 2023 13:04 |
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