Computational Simulation of a Turbulent Jet Noise, Using the Acoustic Analogy

In the present study the generation and the propagation of sound wave in low Mach number flows are numerically studied. Since one of the major problems in aeroengine design is the reduction of noise pollution, the exact prediction of sonic behavior is of special importance. The target of this study is to simulate a leakage, as a free jet. The basis of this study is the hybrid method for which benchmark Reynolds stress turbulence model is applied in solving the flow field and the Lighthill analogy is used for acoustic field analysis. Meanwhile, the continuous filter white noise is applied for solving the instantaneous velocity. Accordingly, the sound pressure level profiles for axial and transverse directions are plotted. Comparison of our results with existing benchmark data is satisfactory.