Influence of the turbulent boundary layer pressure fluctuation on the sound intensity measurement in a mean flow

Xiao-jun SHI, Finn Jacobsen

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The influence of turbulent boundary layer pressure fluctuation on the sound intensity measurement in a flow is a subject of practical concern, because the sound intensity probe is generally exposed to the airflow and is sensed the turbulent boundary layer (TBL) pressure fluctuation which may even overwhelm the true source pressure in some cases. In this paper, the model of the sound intensity caused by the TBL pressure fluctuation is described firstly. Based upon the developed model, the sound intensity caused by the TBL pressure fluctuation is calculated using the available models of the wave-vector frequency spectra of the TBL pressure fluctuation. In order to validate the model and the numerical results, a serious of measurements were carried out. It is shown that the calculated results of the TBL pressure fluctuation agree fairly well with the measured results which are corrected with the estimated spatial response function of the microphone. Also, the characteristics of the measured sound intensity are consistent with that of the calculated sound intensity.
Original languageEnglish
JournalJournal of Ship Mechanics
Volume14
Issue number3
Pages (from-to)314-323
ISSN1007-7294
Publication statusPublished - 2010

Keywords

  • Pressure fluctuation
  • Sound
  • Sound intensity
  • Turbulent boundary layer

Cite this

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title = "Influence of the turbulent boundary layer pressure fluctuation on the sound intensity measurement in a mean flow",
abstract = "The influence of turbulent boundary layer pressure fluctuation on the sound intensity measurement in a flow is a subject of practical concern, because the sound intensity probe is generally exposed to the airflow and is sensed the turbulent boundary layer (TBL) pressure fluctuation which may even overwhelm the true source pressure in some cases. In this paper, the model of the sound intensity caused by the TBL pressure fluctuation is described firstly. Based upon the developed model, the sound intensity caused by the TBL pressure fluctuation is calculated using the available models of the wave-vector frequency spectra of the TBL pressure fluctuation. In order to validate the model and the numerical results, a serious of measurements were carried out. It is shown that the calculated results of the TBL pressure fluctuation agree fairly well with the measured results which are corrected with the estimated spatial response function of the microphone. Also, the characteristics of the measured sound intensity are consistent with that of the calculated sound intensity.",
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Influence of the turbulent boundary layer pressure fluctuation on the sound intensity measurement in a mean flow. / SHI, Xiao-jun; Jacobsen, Finn.

In: Journal of Ship Mechanics, Vol. 14, No. 3, 2010, p. 314-323.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Influence of the turbulent boundary layer pressure fluctuation on the sound intensity measurement in a mean flow

AU - SHI, Xiao-jun

AU - Jacobsen, Finn

PY - 2010

Y1 - 2010

N2 - The influence of turbulent boundary layer pressure fluctuation on the sound intensity measurement in a flow is a subject of practical concern, because the sound intensity probe is generally exposed to the airflow and is sensed the turbulent boundary layer (TBL) pressure fluctuation which may even overwhelm the true source pressure in some cases. In this paper, the model of the sound intensity caused by the TBL pressure fluctuation is described firstly. Based upon the developed model, the sound intensity caused by the TBL pressure fluctuation is calculated using the available models of the wave-vector frequency spectra of the TBL pressure fluctuation. In order to validate the model and the numerical results, a serious of measurements were carried out. It is shown that the calculated results of the TBL pressure fluctuation agree fairly well with the measured results which are corrected with the estimated spatial response function of the microphone. Also, the characteristics of the measured sound intensity are consistent with that of the calculated sound intensity.

AB - The influence of turbulent boundary layer pressure fluctuation on the sound intensity measurement in a flow is a subject of practical concern, because the sound intensity probe is generally exposed to the airflow and is sensed the turbulent boundary layer (TBL) pressure fluctuation which may even overwhelm the true source pressure in some cases. In this paper, the model of the sound intensity caused by the TBL pressure fluctuation is described firstly. Based upon the developed model, the sound intensity caused by the TBL pressure fluctuation is calculated using the available models of the wave-vector frequency spectra of the TBL pressure fluctuation. In order to validate the model and the numerical results, a serious of measurements were carried out. It is shown that the calculated results of the TBL pressure fluctuation agree fairly well with the measured results which are corrected with the estimated spatial response function of the microphone. Also, the characteristics of the measured sound intensity are consistent with that of the calculated sound intensity.

KW - Pressure fluctuation

KW - Sound

KW - Sound intensity

KW - Turbulent boundary layer

M3 - Journal article

VL - 14

SP - 314

EP - 323

JO - Chuanbo Lixue

JF - Chuanbo Lixue

SN - 1007-7294

IS - 3

ER -