Three dimensional CFD analysis of slat noise

Bassam Rakhshani, Antonio Filippone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Three dimensional time accurate simulation based on the Reynolds-Averaged Navier-Stokes equations have been carried out. The unsteady dynamics of the slat flowfield and in particular the slat cove region has been predicted. 3D simulations of the slat cove flow over a computational model of 0.3 x 1m (0/3 m span and 1 m chord length) have improved the accuracy of the unsteady nearfield solution comparing the 2D calculations. The unsteady vorticity structures in the slat cove have been captured and the acoustic power level has been computed. Also a full acoustic scan over the slat surfaces and inside the cove region was conducted by the use of source models such as Proudman's formula and boundary layer noise source model. Analysis of the 3D result demonstrates the importance of the reattachment region for its turbulent fluctuations that enforce the generation of slat noise (broadband). The computed acoustic characteristics (in terms of the frequency spectrum) at receivers located at fixed distance from the slat model in the computational domain resemble the previously computed acoustic spectra of two dimensional calculations.
Original languageEnglish
Title of host publication46th AIAA Aerospace Sciences Meeting and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics
Publication statusPublished - 2008
Externally publishedYes
Event46th AIAA Aerospace Sciences Meeting and Exhibit - Reno, United States
Duration: 7 Jan 200810 Jan 2008

Conference

Conference46th AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno
Period7/01/0810/01/08

Fingerprint

charge flow devices
acoustics
boundary layer noise
Navier-Stokes equation
vorticity
attachment
simulation
receivers
broadband

Cite this

Rakhshani, B., & Filippone, A. (2008). Three dimensional CFD analysis of slat noise. In 46th AIAA Aerospace Sciences Meeting and Exhibit [2008-0015] American Institute of Aeronautics and Astronautics.
Rakhshani, Bassam ; Filippone, Antonio. / Three dimensional CFD analysis of slat noise. 46th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 2008.
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title = "Three dimensional CFD analysis of slat noise",
abstract = "Three dimensional time accurate simulation based on the Reynolds-Averaged Navier-Stokes equations have been carried out. The unsteady dynamics of the slat flowfield and in particular the slat cove region has been predicted. 3D simulations of the slat cove flow over a computational model of 0.3 x 1m (0/3 m span and 1 m chord length) have improved the accuracy of the unsteady nearfield solution comparing the 2D calculations. The unsteady vorticity structures in the slat cove have been captured and the acoustic power level has been computed. Also a full acoustic scan over the slat surfaces and inside the cove region was conducted by the use of source models such as Proudman's formula and boundary layer noise source model. Analysis of the 3D result demonstrates the importance of the reattachment region for its turbulent fluctuations that enforce the generation of slat noise (broadband). The computed acoustic characteristics (in terms of the frequency spectrum) at receivers located at fixed distance from the slat model in the computational domain resemble the previously computed acoustic spectra of two dimensional calculations.",
author = "Bassam Rakhshani and Antonio Filippone",
year = "2008",
language = "English",
booktitle = "46th AIAA Aerospace Sciences Meeting and Exhibit",
publisher = "American Institute of Aeronautics and Astronautics",
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Rakhshani, B & Filippone, A 2008, Three dimensional CFD analysis of slat noise. in 46th AIAA Aerospace Sciences Meeting and Exhibit., 2008-0015, American Institute of Aeronautics and Astronautics, 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, United States, 7/01/08.

Three dimensional CFD analysis of slat noise. / Rakhshani, Bassam; Filippone, Antonio.

46th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 2008. 2008-0015.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Three dimensional CFD analysis of slat noise

AU - Rakhshani, Bassam

AU - Filippone, Antonio

PY - 2008

Y1 - 2008

N2 - Three dimensional time accurate simulation based on the Reynolds-Averaged Navier-Stokes equations have been carried out. The unsteady dynamics of the slat flowfield and in particular the slat cove region has been predicted. 3D simulations of the slat cove flow over a computational model of 0.3 x 1m (0/3 m span and 1 m chord length) have improved the accuracy of the unsteady nearfield solution comparing the 2D calculations. The unsteady vorticity structures in the slat cove have been captured and the acoustic power level has been computed. Also a full acoustic scan over the slat surfaces and inside the cove region was conducted by the use of source models such as Proudman's formula and boundary layer noise source model. Analysis of the 3D result demonstrates the importance of the reattachment region for its turbulent fluctuations that enforce the generation of slat noise (broadband). The computed acoustic characteristics (in terms of the frequency spectrum) at receivers located at fixed distance from the slat model in the computational domain resemble the previously computed acoustic spectra of two dimensional calculations.

AB - Three dimensional time accurate simulation based on the Reynolds-Averaged Navier-Stokes equations have been carried out. The unsteady dynamics of the slat flowfield and in particular the slat cove region has been predicted. 3D simulations of the slat cove flow over a computational model of 0.3 x 1m (0/3 m span and 1 m chord length) have improved the accuracy of the unsteady nearfield solution comparing the 2D calculations. The unsteady vorticity structures in the slat cove have been captured and the acoustic power level has been computed. Also a full acoustic scan over the slat surfaces and inside the cove region was conducted by the use of source models such as Proudman's formula and boundary layer noise source model. Analysis of the 3D result demonstrates the importance of the reattachment region for its turbulent fluctuations that enforce the generation of slat noise (broadband). The computed acoustic characteristics (in terms of the frequency spectrum) at receivers located at fixed distance from the slat model in the computational domain resemble the previously computed acoustic spectra of two dimensional calculations.

M3 - Conference contribution

BT - 46th AIAA Aerospace Sciences Meeting and Exhibit

PB - American Institute of Aeronautics and Astronautics

ER -

Rakhshani B, Filippone A. Three dimensional CFD analysis of slat noise. In 46th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics. 2008. 2008-0015