Airfoil trailing-edge noise prediction based on CFD/CAA coupled boundary method

Flow-induced noise hybrid prediction method based on sound wave boundary condition is an effective numerical to deal with a flow-induced problems of complex configuration. This can not only finely simulate the source, but also analyze propagation characteristics. In this paper, methods such as space-time discrete scheme and conditions involved in solution acoustic perturbation equations(APE) are developed, strategies adding buffer layer proposed improve divergence caused by discontinuity at junction source region region, so establish high-precision method. order study rationality method, simulation radiation trailing edge NACA0012 airfoil BANC experiment was carried out. Compared results field solved large eddy analysis shows that predict spatial distribution high precision directly reflect interaction between waves. simulation, error pressure level less than 2 dB, directional trend consistent.