Computational Fluid Dynamics Verification and Noise Prediction of Ramjet with Wedge-shaped Flame Holder

The Lighthill acoustic analogy equation is adopted to research noise distribution at dissimilarity positions and the variations are conducted based on the numerical verification of flow field under different turbulence models, time step sizes and meshes. The results showed the proposed computation method is reliable and practicable to obtain the complex flow parameters in the ramjet combustion chamber; Most of the noise is higher-frequency, and the differences in the near and far field are proven. In addition, noise laws are identical with the same horizontal position.