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CFD-based study on one- and two-point statistics of wall pressure fluctuations

Hu, Nan (2022) CFD-based study on one- and two-point statistics of wall pressure fluctuations. In: 28th AIAA/CEAS Aeroacoustics Conference, 2022. 28th AIAA/CEAS Aeroacoustics Conference, Southampton, England. doi: 10.2514/6.2022-3020. ISBN 978-162410664-4.

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Official URL: https://doi.org/10.2514/6.2022-3020

Abstract

This paper presents a study on the statistics of wall pressure fluctuations with the so-called TNO-Blake model. The focus is on the statistics which have essential importance for the surface structural vibration, such as the one-point and wavenumber-frequency spectra, the coherence lengths and the convection velocity of the wall pressure field. The turbulent-boundary-layer (TBL) parameters which needed for the model are provided by RANS calculations. Calculations were carried out for zero pressure gradient flows with two velocities and an adverse pressure gradient flow, illustrating Reynolds number and pressure gradient effects. The effects on the one-point spectra, especially the contribution from different wall-normal positions across TBL, and on two-point statistics are discussed. Furthermore, the impact of different formulations for the velocity spectrum and moving axis spectrum on the wall pressure statistics is demonstrated.

Item URL in elib:https://elib.dlr.de/187083/
Document Type:Conference or Workshop Item (Speech)
Title:CFD-based study on one- and two-point statistics of wall pressure fluctuations
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hu, NanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:2022
Journal or Publication Title:28th AIAA/CEAS Aeroacoustics Conference, 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI:10.2514/6.2022-3020
ISBN:978-162410664-4
Status:Published
Keywords:Wall pressure fluctuations, Reynolds number effect, adverse pressure gradient effect, buffer layer contribution, time and length scales
Event Title:28th AIAA/CEAS Aeroacoustics Conference
Event Location:Southampton, England
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Hu, Nan
Deposited On:13 Oct 2022 12:27
Last Modified:20 Oct 2022 11:03

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