Proceedings ArticleDOI
Effect of Angle of Attack and Airfoil Shape on Turbulence-Interaction Noise
Michel Roger,Vincent Jurdic +1 more
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This article is published in AIAA/CEAS Aeroacoustics Conference.The article was published on 2005-05-23. It has received 120 citations till now. The article focuses on the topics: Noise & Angle of attack.read more
Citations
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Journal ArticleDOI
Extensions and limitations of analytical airfoil broadband noise models
Michel Roger,Stéphane Moreau +1 more
TL;DR: In this article, the authors present a state-of-the-art analytical model to predict the broadband noise generated by thin airfoils in a flow, either clean or disturbed, by impingement of upstream turbulence, scattering of boundary-layer turbulence as sound at the trailing edge for an attached flow called trailing-edge noise, and the noise generated due to the formation of a coherent vortex shedding in the near wake of a thick trailing edge, called vortex-shedding noise.
Journal ArticleDOI
Sound radiation from real airfoils in turbulence
TL;DR: In this paper, the authors measured the leading edge noise of three airfoils immersed in turbulence and found that the airfoil response function was centered on zero angle of attack (AOA), rather than the zero lift AOA (ZOA).
Journal ArticleDOI
Competing Broadband Noise Mechanisms in Low-Speed Axial Fans
Stéphane Moreau,Michel Roger +1 more
TL;DR: In this paper, the authors compared two broadband noise mechanisms, the trailing edge noise or self-noise, and the leading-edge noise or turbulence-ingestion noise, in several blade technologies.
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Broadband noise prediction of fan outlet guide vane using a cascade response function
TL;DR: In this paper, an analytical model of the broadband noise produced by both the interaction of ingested turbulence with a fan rotor blades and the rotor-wake impingement on downstream stator vanes is proposed and detailed.
Journal ArticleDOI
Symmetric airfoil geometry effects on leading edge noise.
TL;DR: It is shown that accurate leading edge noise predictions can be made when assuming an inviscid meanflow, but that it is not valid to assume a uniform meanflow.
References
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Journal ArticleDOI
Sound Generation by Turbulence and Surfaces in Arbitrary Motion
TL;DR: In this article, sound generation by turbulence and surfaces in arbitrary motion is discussed, and sound and multipole fields and governing equations are discussed. But sound generation is not discussed in this paper.
Journal ArticleDOI
Acoustic radiation from an airfoil in a turbulent stream
TL;DR: In this paper, a theoretical expression for the far-field acoustic power spectral density produced by an airfoil in a subsonic turbulent stream is given in terms of quantities characteristics of the turbulence.
Journal ArticleDOI
Back-scattering correction and further extensions of amiet's trailing-edge noise model. Part 1: theory
Michel Roger,Stéphane Moreau +1 more
TL;DR: In this paper, a leading-edge backscattering correction is derived, based on the solution of an equivalent Schwarzschild problem, and added to the original formula to account for all the effects due to a limited chord length, and to infer the far-field radiation off the mid-span plane.
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Computation of Trailing-Edge Flow and Noise Using Large-Eddy Simulation
Meng Wang,Parviz Moin +1 more
TL;DR: In this article, a large-eddy simulation (LES) technique was used to obtain the unsteady wall-pressure e elds and the acousticsource functions. But the LES domain is not adequate for predicting noise radiation over a range of frequencies.
Journal ArticleDOI
A theory of turbulent flow round two-dimensional bluff bodies
TL;DR: In this paper, it was shown that the turbulent velocity around a circular cylinder placed in a turbulent flow can be calculated outside and upstream of the regions of separated flow, if the incident turbulent flow satisfies the following conditions: (i) if a/Lx [Lt ] 1 or = O(1), Re−1 is the r.m.s.