Three-dimensional(3D)unsteady compressible flow over an open cavity and the relevant aeroacoustics are studied using a hybrid LES-acoustic analogy method.
The gust-cascade interaction noise was numerically simulated using computational aeroacoustics by solving the two-dimensional linearized Euler equations.
Most of the work was based on experiment results, and some empirical formulas of shock wave peak pressure, electroacoustical efficiency, and plasma parameters were obtained.
This includes mainly the technique of the sealoor topographic survey, the technique of the seafloor mophological survey and the technique of the sea subbottom profile survey etc.
The low frequency acoustic design for an automobile body structure is very important to improve the carborne acoustic comfortability and to enhance the competitiveness for the car products in market.
In hydroacoustics, it is short of an intensive investigation for the problem.So a numerical scheme for the prediction of flow-induced noise in water is expected to be established in the paper.