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Acoustic Localization of Vane Faults in Turbomachinery Based on Source Modeling

Jürgens, Werner and Tapken, Ulf and Lemke, Olaf and Röhle, Ingo and Enghardt, Lars (2014) Acoustic Localization of Vane Faults in Turbomachinery Based on Source Modeling. In: 20th AIAA/CEAS Aeroacoustics Conference 2014. 20th AIAA/CEAS Aeroacoustics Conference, 2014-06-16 - 2014-06-20, Atlanta, USA. doi: 10.2514/6.2014-3319.

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Abstract

The sound field in the annular duct of a one-stage turbine test-rig is investigated with the aim of detecting the location of stator vane faults. For this purpose, individual stator vanes are artificially damaged by a wedge-shaped cut out at the trailing edge of the vane. Shape and size of the cut out resemble typical vane burn-off faults. The sound field generated by the damaged stator row is measured inside the duct with an array of microphones. Subsequently, the acoustic far-field part of the sound is decomposed into a sum of radial-azimuthal, propagating eigenmodes. Comparison with the undamaged turbine stage reveals that the amplitudes of certain modes increase due to the damage. In order to localize the damaged vanes, the generating mechanism of stator-rotor interaction tones is modeled by lines of dipoles at the leading edge of the rotor blades. Using this model, we demonstrate that the location of the damaged vanes of a stator row can be detected successfully if the fault locations of a reference configuration are known.

Item URL in elib:https://elib.dlr.de/94653/
Document Type:Conference or Workshop Item (Speech)
Title:Acoustic Localization of Vane Faults in Turbomachinery Based on Source Modeling
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Jürgens, WernerDLR, AT-TRAUNSPECIFIEDUNSPECIFIED
Tapken, UlfUNSPECIFIEDhttps://orcid.org/0000-0002-0870-1253138665819
Lemke, OlafUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Röhle, IngoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Enghardt, LarsDLR, AT-TRAUNSPECIFIEDUNSPECIFIED
Date:June 2014
Journal or Publication Title:20th AIAA/CEAS Aeroacoustics Conference 2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI:10.2514/6.2014-3319
Status:Published
Keywords:acoustic measurement technique, duct acoustics, noise source localization, detection of vane faults, turbomachinery
Event Title:20th AIAA/CEAS Aeroacoustics Conference
Event Location:Atlanta, USA
Event Type:international Conference
Event Start Date:16 June 2014
Event End Date:20 June 2014
Organizer:AIAA / CEAS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old), L - Fan and Compressor Technologies (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Tapken, Dr. Ulf
Deposited On:15 Jan 2015 15:11
Last Modified:24 Apr 2024 20:00

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