1980
DOI: 10.1121/1.384474
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On the radiated noise due to boundary-layer transition

Abstract: A theory is presented for the noise radiated by the incompressible boundary-layer transition that occurs on an infinite, rigid flat plate. It is hypothesized that it is the intermittency of the boundary-layer flow within the transition zone that is dominant in noise production. Using Lighthill’s analogy, it is shown that dipole, quadrupole, and octupole sources are generated. The dipole sources are attributable to the shear stress fluctuations that occur in transitional flow while the others are due to fluctua… Show more

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Cited by 19 publications
(14 citation statements)
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“…In a similar manner, the noise generated by specific features of the TBL has been investigated. In particular, Lauchle (1980) considered sound wave production during the boundary-layer transition. In an attempt to shed a new light on sound sources of TBL, Hardin (1991) analysed the noise generated by various vortical phenomena such as the formation of horseshoe vortices and the emergence of viscous sublayer bursts.…”
mentioning
confidence: 99%
“…In a similar manner, the noise generated by specific features of the TBL has been investigated. In particular, Lauchle (1980) considered sound wave production during the boundary-layer transition. In an attempt to shed a new light on sound sources of TBL, Hardin (1991) analysed the noise generated by various vortical phenomena such as the formation of horseshoe vortices and the emergence of viscous sublayer bursts.…”
mentioning
confidence: 99%
“…In essence, the analytical methods parallel those of an earlier analysis in which the role of a fluctuating shear stress was addressed [1]. Based on numerical calculations of the power spectral density and on the relative magnitudes of the radiation efficiency, the mechanism treated in the present paper is foind to be much more productive as a noise source than is the shear stress mechanism.…”
Section: Discussionmentioning
confidence: 69%
“…7 is a prediction for the shear stress contribution to the transition zone noise [1]. Clearly, the fluctuating displacement thickness mechanism appears to dominate.…”
Section: A Case 1: Flat Plate In Airmentioning
confidence: 99%
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