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Comparative study of different analytical approaches for modelling the transmission of sound waves through turbomachinery stators

Behn, Maximilian and Tapken, Ulf and Puttkammer, Peter and Hagmeijer, Rob and Thouault, Nicolas (2016) Comparative study of different analytical approaches for modelling the transmission of sound waves through turbomachinery stators. In: AIAA JOURNAL, AIAA 2016-2927. 22nd AIAA/CEAS Aeroacoustics Conference, 30. Mai - 1. Juni 2016, Lyon, Frankreich. DOI: http://dx.doi.org/10.2514/6.2016-2927

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2016-2927

Abstract

The present study is dealing with the analytical modelling of sound transmission through turbomachinery stators. Two-dimensional cascade models are applied in combination with a newly proposed impedance model to account for the effect of flow deflection on the propagation of acoustic modes in annular flow ducts. Further, two different approaches for the calculation of the 3D mode transmission using 2D cascade models are used. The proposed methods allow the consideration of vane twist and mode scattering w.r.t. the radial mode order. The results obtained with the different approaches are compared with the outcome of numerical calculations for several flat plate cascades and a generic LPT vane geometry. The similarities and differences between the different analytical approaches are examined. It is shown, that the flow deflection through a stator row has a significant influence on the transmitted and reflected sound power. Furthermore, the occurrence of total transmission resp. zero reflection along with non-zero transmission is identified for particular mode orders and related to special conditions occurring in 2D cascade models.

Item URL in elib:https://elib.dlr.de/109510/
Document Type:Conference or Workshop Item (Speech)
Title:Comparative study of different analytical approaches for modelling the transmission of sound waves through turbomachinery stators
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Behn, Maximilianmaximilian.behn (at) dlr.deUNSPECIFIED
Tapken, Ulfulf.tapken (at) dlr.deUNSPECIFIED
Puttkammer, PeterUniversity of TwenteUNSPECIFIED
Hagmeijer, RobUniversity of TwenteUNSPECIFIED
Thouault, NicolasMTU Aero Engines AGUNSPECIFIED
Date:June 2016
Journal or Publication Title:AIAA JOURNAL
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
DOI :http://dx.doi.org/10.2514/6.2016-2927
Page Range:AIAA 2016-2927
Status:Published
Keywords:Engine Acoustics, Sound transmission, reflection, scattering, Aero engines, Cascade model, flow deflection, CFD, CAA, Radial Modes
Event Title:22nd AIAA/CEAS Aeroacoustics Conference
Event Location:Lyon, Frankreich
Event Type:international Conference
Event Dates:30. Mai - 1. Juni 2016
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, L - Fan and Compressor Technologies
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Behn, Maximilian
Deposited On:04 Jan 2017 11:43
Last Modified:07 Feb 2018 16:23

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