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

Influence of Different Flow Solvers and Off-Design Conditions on the Determination of Fan-Rotor Wakes for Broadband Noise Prediction

Meier zu Ummeln, Robert and Moreau, Antoine and Schnoes, Markus (2022) Influence of Different Flow Solvers and Off-Design Conditions on the Determination of Fan-Rotor Wakes for Broadband Noise Prediction. In: ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022, 5. The American Society of Mechanical Engineers. ASME Turbo Expo 2022, 13.-17. Juni 2022, Rotterdam, The Netherlands. doi: 10.1115/GT2022-78406. ISBN 978-079188612-0.

[img] PDF
452kB

Official URL: https://asmedigitalcollection.asme.org/GT/proceedings-abstract/GT2022/86021/V005T10A002/1148836

Abstract

The acoustic interaction of fan-rotor wakes with the downstream stator vanes is considered as an important noise source of an aircraft engine. The turbulence induced by the rotor generates a stochastic acoustic source that appears as broadband noise in the acoustic spectrum. During the preliminary design phase of an engine, established meanline and throughflow solvers usually do not resolve turbulence and associated unsteady flow parameters. But such solvers provide rotor pressure losses that can be used to estimate the mean and turbulent rotor wakes. A crucial step is the deduction of turbulence parameters from the mean wakes. A semi-empirical model for rotor-wake turbulence estimation is presented in this paper. The meanline method and the throughflow solver are compared to three-dimensional computational flow simulations investigating the capabilities of the different solvers to provide flow data for broadband wake interaction noise prediction. The methods are applied to a representative modern fan stage at a comprehensive number of operating points, comprising several speed lines from surge to choking conditions. Microphone measurements are consulted to assess the noise predictions. The evaluation confirms the applicability of the meanline and throughflow method in combination with the turbulence model for broadband noise estimation during the preliminary design phase. The underestimated turbulence in the tip region of the fan is found to be negligible even during off-design conditions.

Item URL in elib:https://elib.dlr.de/189103/
Document Type:Conference or Workshop Item (Speech)
Title:Influence of Different Flow Solvers and Off-Design Conditions on the Determination of Fan-Rotor Wakes for Broadband Noise Prediction
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Meier zu Ummeln, RobertUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moreau, AntoineUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schnoes, MarkusUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:28 October 2022
Journal or Publication Title:ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:5
DOI:10.1115/GT2022-78406
Publisher:The American Society of Mechanical Engineers
Series Name:Turbo Expo: Power for Land, Sea, and Air
ISBN:978-079188612-0
Status:Published
Keywords:fan noise, pre-design, turbulence modeling, broadband noise
Event Title:ASME Turbo Expo 2022
Event Location:Rotterdam, The Netherlands
Event Type:international Conference
Event Dates:13.-17. Juni 2022
Organizer:ASME
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Virtual Engine
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Institute of Propulsion Technology > Fan and Compressor
Deposited By: Meier zu Ummeln, Robert
Deposited On:24 Oct 2022 08:25
Last Modified:10 Aug 2023 08:05

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.