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Time-Accurate Simulations and Acoustic Analysis of Slat Free-Shear LayerA detailed computational aeroacoustic analysis of a high-lift flow field is performed. Time-accurate Reynolds Averaged Navier-Stokes (RANS) computations simulate the free shear layer that originates from the slat cusp. Both unforced and forced cases are studied. Preliminary results show that the shear layer is a good amplifier of disturbances in the low to mid-frequency range. The Ffowcs-Williams and Hawkings equation is solved to determine the acoustic field using the unsteady flow data from the RANS calculations. The noise radiated from the excited shear layer has a spectral shape qualitatively similar to that obtained from measurements in a corresponding experimental study of the high-lift system.
Document ID
20010057067
Document Type
Preprint (Draft being sent to journal)
Authors
Khorrami, Mehdi R. (NASA Langley Research Center Hampton, VA United States)
Singer, Bart A. (NASA Langley Research Center Hampton, VA United States)
Berkman, Mert E. (High Technology Corp. Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2001
Subject Category
Acoustics
Report/Patent Number
AIAA Paper 2001-2155
Meeting Information
7th AIAA/CEAS Aeroacoustics Conference(Maastricht)
Funding Number(s)
CONTRACT_GRANT: RT46324
CONTRACT_GRANT: NAS1-20102
Distribution Limits
Public
Copyright
Public Use Permitted.

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