A RANS based procedure for jet flow and noise prediction

摘要

In this paper, a procedure combing Reynolds averaged Navier-Stokes (RANS) equation and the Ffowcs Williams and Hawkings (FW-H) equation for jet noise prediction is presented using the commercial code FLUENT. Numerical simulation of the three-dimensional turbulent round jet is processed by solving RANS equations with five two-equation turbulence models, including the standard k — ε model, the RNG k —ε model, the realizable k— ε model, the standard k -ω mode and the SST k ω model and the realizable k — ε model is proved to the most precise one for the turbulent round jet prediction. And the radiated far-field noise is predicted using the FW-H surface integral method and RANS equations with the realizable k — ε model. The effect of the choice of FW-H integration surface on the far field noise predictions is studied. Based on these calculations and result validations, it can be concluded that the proposed method is practical for jet flow field and jet flow noise prediction.