Towards Direct Computation of Aeroacoustic Noise with the High-Order FR/CPR Method

摘要

The direct computation of aeroacoustic noise with the high-order FR/CPR method is presented in this paper. The focal point of the investigation is the accuracy and efficiency of the high-order FR/CPR method on the aeroacoustic field. Implicit Large Eddy Simulation (ILES) is performed with the Flux Reconstruction/Correction Procedure via Reconstruction(FR/CPR) method for a generic car mirror at a Reynolds number of 5.2 × 10~5 and the 30P30N three element airfoil at a Reynolds number of 1.7 × 10~6. Comparisons are made with experimental data whenever possible. For the side mirror case, the spectra of the Sound Pressure Level (SPL) at monitor points are compared with experimental data from the literature. For the 30P30N case, the surface quantities, off-body flow characteristics and the frequency spectra of pressure fluctuations on the slat surface are compared with experimental measurements. Good quantitative agreements are achieved. It is shown that the high-order FR/CPR method is accurate and efficient in predicting the near-field aeroacoustics associated with turbulent vortices.