Measurement of noise radiated by boundary layer excited panels

Maestrello, Lucid

doi:10.1016/0022-460x(65)90088-x

Cited by 29 publications

(7 citation statements)

References 3 publications

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“…The result is completely analogous to the expression obtained in considering the inertial behavior of con struction (11) if k 0 → is substituted in the latter. As a result of generalizing the array of data obtained in laboratory and summer experiments, relations were obtained [7,8].…”

Section: ∫ ∫supporting

confidence: 63%

“…Figure 8 shows analogous results for a subsonic flow velocity (M = 0.47). Here the sound power levels measured in the 1/3 octave fre quency bands [11] are compared with the calculated values. From Figs.…”

Section: ∫ ∫mentioning

confidence: 99%

“…As a result of generalizing the array of data obtained in laboratory and summer experiments, relations were obtained [7,8]. (11), (16) and integrating, we find the universal dependence Δ = Δ(St, ), where is the dimension less wavenumber. Under inertial behavior of the con struction, = ae/k q , and in the case of its resonance excitation, = k/k q .…”

Section: ∫ ∫mentioning

confidence: 99%

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A comparative estimate of acoustic emission of thin-walled structures excited by a turbulent boundary layer for various representations of the mutual spectrum

Zverev

Efimtsov

2012

Acoust. Phys.

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We present the results of comparative studies of the acoustic emission of thin walled structures excited by the field of near wall pressure pulsations of a turbulent boundary layer for cases when the mutual spectrum of the field is described by a multiplicative model or a model with elliptical windows. A universal dependence is obtained for determining the difference in the acoustic emission levels of elastically inertial systems using to considered models of representing the mutual spectrum

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Section: ∫ ∫supporting

confidence: 63%

Section: ∫ ∫mentioning

confidence: 99%

Section: ∫ ∫mentioning

confidence: 99%

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A comparative estimate of acoustic emission of thin-walled structures excited by a turbulent boundary layer for various representations of the mutual spectrum

Zverev

Efimtsov

2012

Acoust. Phys.

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“…Several theoretical, numerical and experimental studies were performed to explore the vibration and radiation of sound from isolated panels (i.e., not coupled with an acoustic cabin), excited by the turbulent flows [3][4][5][6][7][8][9]. These investigations provide knowledge about the shape of the power spectrum and space-time correlation of the TBL pressure fluctuations on aircraft panels, as well as displacement and acceleration spectra of the vibrating panels.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Turbulent Boundary Layer Induced Noise in the Cabin of a BWB Aircraft

Rocha

Suleman

Lau

2012

Shock and Vibration

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This paper discusses the development of analytical models for the prediction of aircraft cabin noise induced by the external turbulent boundary layer (TBL). While, in previous works, the contribution of an individual panel to the cabin interior noise was considered, here, the simultaneous contribution of multiple flow-excited panels is analyzed. Analytical predictions are presented for the interior sound pressure level (SPL) at different locations inside the cabin of a Blended Wing Body (BWB) aircraft, for the frequency range 0–1000 Hz. The results show that the number of vibrating panels significantly affects the interior noise levels. It is shown that the average SPL, over the cabin volume, increases with the number of vibrating panels. Additionally, the model is able to predict local SPL values, at specific locations in the cabin, which are also affected with by number of vibrating panels, and are different from the average values.

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“…In o few cases, spatial crosscorrelations have been mcasured, and in general, they support the conclusions drawn from the wind tunnel measurements, except for the increase in overall level as noted above. Flight data have been obtained on a glider wing [27], on commercial [28] and military aircraft [29], and for spaceciaft [30], launch vehicles [31] and experimental military payloads [32]. The TBL environment can be summarized as follows: N 1.…”

mentioning

confidence: 99%

Random Noise and Vibration in Space Vehicles

Lyon¹

1967

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Measurement of noise radiated by boundary layer excited panels

Cited by 29 publications

References 3 publications

A comparative estimate of acoustic emission of thin-walled structures excited by a turbulent boundary layer for various representations of the mutual spectrum

A comparative estimate of acoustic emission of thin-walled structures excited by a turbulent boundary layer for various representations of the mutual spectrum

Prediction of Turbulent Boundary Layer Induced Noise in the Cabin of a BWB Aircraft

Random Noise and Vibration in Space Vehicles

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