Linearized Euler simulations of leading-edge slat flow

Takeda, K., Zhang, X. and Nelson, P.A. (2003) Linearized Euler simulations of leading-edge slat flow. 41st Aerospace Sciences Meeting and Exhibit, Reno, NV, USA, 6-9 Jan 2003, Reno, NV, USA. pp. 1-10 .

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper the aeroacoustics of leading-edge slat devices in a high-lift configuration are investigated computationally. In order to perform parametric studies of the aeroacoustics, a simplified two-dimensional model of the slat is used. The acoustics are computed using a linearized Euler solver, with an acoustic source located at the slat trailing edge, the location and strength of which is determined both experimentally and through unsteady RANS simulations.
The linearized Euler solver uses 6th-order pre-factored compact differencing for spatial derivatives and a 4th-order low-dissipation, low-dispersion Runge-Kutta scheme for time integration. A buffer zone boundary condition is used to prevent the reflection of outgoing acoustic waves from contaminating the solution. The code uses a multi-block strategy on curvilinear meshes and is run on PC workstations. The LEE computations are compared with a hybrid unsteady RANS and Ffowcs-Williams Hawkings approach to evaluate the applicability of the LEE method for this class of problem.

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