The noise radiated by subsonic turbulent jet with a Mach number of 0.9 is investigated by the high-order accuracy parallel compressible LES (Large Eddy Simulation) method, and the far field sound is solved and analyzed by the permeable FW-H (Ffowcs Wi...
The noise radiated by subsonic turbulent jet with a Mach number of 0.9 is investigated by the high-order accuracy parallel compressible LES (Large Eddy Simulation) method, and the far field sound is solved and analyzed by the permeable FW-H (Ffowcs Williams-Hawkings) wave extrapolation method. The jet mean flow and turbulence statistics is verified carefully to ensure the fidelity and accuracy of the simulation. Applying the frequency domain permeable FW-H method educe the predominant sound mode of the jet flow, and it is found that the coherent structures or the instability waves at the potential core end region form the low wave number wave packets lead to the predominant sound modes radiation.