Wall-pressure spectra models for supersonic and hypersonic turbulent boundary layers

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper presents an investigation of pressure fluctuations spectra beneath supersonic and hypersonic turbulent boundary layers at zero pressure gradient. High-order implicit Large Eddy Simulations have been used to provide numerical data for assessing existing models and further improving their qualitative accuracy in predicting wall-pressure spectra. Several different models have been investigated and it is shown that existing models fail to capture the correct behaviour of pressure fluctuations in supersonic and hypersonic boundary layers across a broad range of frequencies. The models have been modified by introducing compressibility corrections. The modified models are validated against implicit Large Eddy Simulations, Direct Numerical Simulations, and experimental data. The qualitative accuracy of the models is discussed and the most promising model is identified.
LanguageEnglish
Pages90-108
Number of pages19
JournalJournal of Sound and Vibration
Volume443
Early online date19 Nov 2018
DOIs
Publication statusPublished - 17 Mar 2019

Fingerprint

hypersonic boundary layer
wall pressure
turbulent boundary layer
Hypersonic aerodynamics
Boundary layers
Large eddy simulation
large eddy simulation
Hypersonic boundary layers
supersonic boundary layers
Direct numerical simulation
Pressure gradient
direct numerical simulation
Compressibility
pressure gradients
compressibility

Keywords

  • compressible
  • supersonic
  • hypersonic
  • acoustic loading
  • spectra models

Cite this

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title = "Wall-pressure spectra models for supersonic and hypersonic turbulent boundary layers",
abstract = "This paper presents an investigation of pressure fluctuations spectra beneath supersonic and hypersonic turbulent boundary layers at zero pressure gradient. High-order implicit Large Eddy Simulations have been used to provide numerical data for assessing existing models and further improving their qualitative accuracy in predicting wall-pressure spectra. Several different models have been investigated and it is shown that existing models fail to capture the correct behaviour of pressure fluctuations in supersonic and hypersonic boundary layers across a broad range of frequencies. The models have been modified by introducing compressibility corrections. The modified models are validated against implicit Large Eddy Simulations, Direct Numerical Simulations, and experimental data. The qualitative accuracy of the models is discussed and the most promising model is identified.",
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Wall-pressure spectra models for supersonic and hypersonic turbulent boundary layers. / Ritos, K.; Drikakis, D.; Kokkinakis, I. W.

In: Journal of Sound and Vibration, Vol. 443, 17.03.2019, p. 90-108.

Research output: Contribution to journalArticle

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T1 - Wall-pressure spectra models for supersonic and hypersonic turbulent boundary layers

AU - Ritos, K.

AU - Drikakis, D.

AU - Kokkinakis, I. W.

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AB - This paper presents an investigation of pressure fluctuations spectra beneath supersonic and hypersonic turbulent boundary layers at zero pressure gradient. High-order implicit Large Eddy Simulations have been used to provide numerical data for assessing existing models and further improving their qualitative accuracy in predicting wall-pressure spectra. Several different models have been investigated and it is shown that existing models fail to capture the correct behaviour of pressure fluctuations in supersonic and hypersonic boundary layers across a broad range of frequencies. The models have been modified by introducing compressibility corrections. The modified models are validated against implicit Large Eddy Simulations, Direct Numerical Simulations, and experimental data. The qualitative accuracy of the models is discussed and the most promising model is identified.

KW - compressible

KW - supersonic

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KW - acoustic loading

KW - spectra models

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