NUMERICAL-SIMULATION OF TRAILING-EDGE ACOUSTIC VORTICAL INTERACTION

The objective of the present research is twofold. The first part conce rns the construction of a high-resolution aeroacoustic flow solver, an d the remaining emphasizes the wave/vortex interaction around a sharp trailing edge. Euler equations and the Osher-Chakravarthy MUSCL-type h igh-resolution upwind TVD scheme were used, respectively, as the flow model and the numerical algorithm to analyze the acoustically excited now. Modification on the reconstruction of the cell interface values w as first made to improve the scheme fidelity so that a wave propagatio n problem can be solved on nonuniform mesh systems. An acoustic source modeling was also devised to simulate the generation of sound emitted from a monopole located on the solid boundary. The numerical algorith m was first evaluated by checking the computed results with several te st problems that have analytic solutions. Results show that the curren tly proposed computational aeroacoustic scheme is accurate and reliabl e. An acoustically excited incompressible and low-Mach-number now over a finite plate was then simulated. The results show that the unsteady airloads induced by acoustic/vortical interaction around a sharp trai ling edge can be satisfactorily resolved by the currently developed in viscid Euler now solver.