Broadband noise from the unsteady flow in a slat cove

Anurag Agarwal, Philip J. Morris

Research output: Contribution to conferencePaper

4 Citations (Scopus)

Abstract

Noise from high-lift devices such as slats and flaps can contribute significantly to the overall aircraft sound pressure levels, particularly during approach. The acoustic spectrum of the noise radiated from slats exhibits two distinct features. There is a high-frequency tonal noise component, and a high-energy broadband component ranging from low to mid-frequencies. The objective of the present paper is to predict the broadband slat noise. The broadband noise is predicted using a two-step process. First the noise sources are modeled based on the local turbulence information. Then, the sound from these sources is propagated by assuming that the flow past the wing is uniform. A Boundary Element Method is used to find the Green's function for wave propagation in a moving medium in the presence of the wing. The noise in the far field is then predicted by forming a convolution of the Green's function with the modeled sources. The attractive feature of this prediction scheme is the relatively quick computational time, which makes it suitable for new design and control strategies.

Original languageEnglish (US)
Pages9574-9585
Number of pages12
StatePublished - Jul 1 2004
Event42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 5 2004Jan 8 2004

Other

Other42nd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period1/5/041/8/04

Fingerprint

Unsteady flow
Green's function
Acoustic waves
Flaps
Boundary element method
Convolution
Acoustic noise
Wave propagation
Turbulence
Acoustics
Aircraft

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Agarwal, A., & Morris, P. J. (2004). Broadband noise from the unsteady flow in a slat cove. 9574-9585. Paper presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.
Agarwal, Anurag ; Morris, Philip J. / Broadband noise from the unsteady flow in a slat cove. Paper presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.12 p.
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Agarwal, A & Morris, PJ 2004, 'Broadband noise from the unsteady flow in a slat cove' Paper presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States, 1/5/04 - 1/8/04, pp. 9574-9585.

Broadband noise from the unsteady flow in a slat cove. / Agarwal, Anurag; Morris, Philip J.

2004. 9574-9585 Paper presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.

Research output: Contribution to conferencePaper

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Agarwal A, Morris PJ. Broadband noise from the unsteady flow in a slat cove. 2004. Paper presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.