Computational aeroacoustic analysis of slat trailing-edge flow

An acoustic analysis based on the Ffowcs Williams and Hawkings equation (Ffowcs Williams, J. E,, and Hawkings, D. L,, "Sound Generated by Turbulence and Surfaces in Arbitrary Motion," Philosophical Transactions of the Royal Society of London, Vol. A264, No. 1151, 1969, pp, 321-342) was performed for a high-lift system. As input, the acoustic analysis used unsteady how data obtained from a highly resolved, time-dependent, Reynolds-averaged Navier-Stokes calculation. The analysis strongly suggests that vortex shedding from the trailing edge of the slat results in a high-amplitude, high-frequency acoustic signal similar to that which was observed in a corresponding experimental study of the high-lift system.