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Empirical Turbulence Interaction Noise Model for Permeable Flat Plate Leading Edges

Geyer, Thomas and Enghardt, Lars (2024) Empirical Turbulence Interaction Noise Model for Permeable Flat Plate Leading Edges. AIAA Journal. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.J063411. ISSN 0001-1452.

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Official URL: https://arc.aiaa.org/doi/10.2514/1.J063411


One of the major aerodynamic noise generation mechanisms is the interaction of a turbulent flow with a downstream blunt object, such as the blade of a rotating fan or a fixed stator. A possible method to reduce this noise is the use of flow-permeable leading edges, which has been investigated experimentally on a set of flat plates with different leading-edge perforations. The results show that these modifications can lead to notable noise reductions at low and medium frequencies, but also to a noise increase at high frequencies due to the contribution of surface roughness noise. The measured data were then used as an input to a symbolic regression modeling approach with the aim of obtaining a simple yet accurate model to predict the noise reduction capacity of the permeable leading edges. Three different prediction models were finally selected to demonstrate the capability of the current approach. One of the more complex models already predicts correct trends and shows an acceptable mean absolute error, making it a reliable candidate for engineering purposes.

Item URL in elib:https://elib.dlr.de/203985/
Document Type:Article
Title:Empirical Turbulence Interaction Noise Model for Permeable Flat Plate Leading Edges
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Geyer, ThomasUNSPECIFIEDhttps://orcid.org/0000-0003-2380-1188159039528
Date:5 April 2024
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:porous leading edge, aerodynamic noise, empirical model, wind tunnel, permeability, airframe noise
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 - Components and Emissions
Location: Cottbus
Institutes and Institutions:Institute of Electrified Aero Engines > Aeronautical Requirements and Environmental Impact
Deposited By: Geyer, Thomas
Deposited On:06 May 2024 08:31
Last Modified:06 May 2024 08:31

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