Abstract

A numerical simulation of a subsonic turbulent hot jet is performed on full 360 using LES. A geometrical tripping is used in order to trigger the turbulence at the nozzle exit. The validity of the simulation performed has been assessed by comparison with experimental measurements. The mean and rms velocity fields show good agreement, so does the azimuthal composition of the near pressure field and the far field spectra. Some discrepancies remain close to the nozzle exit which lead to some degree of overestimations of the pressure levels in the near field and the far field, especially near the 90 angular sector. The analysis of the near field pressure field shows that there is a strong relationship with the far field, especially in the 30 direction. Further analysis will be performed to deal with the comprehension of the noise generation mechanisms.

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