Large eddy simulations of spatially evolved turbulent round jets were presented.The two SGS models called the standard Smagorinsky;s eddy viscosity model and the non-eddy viscosity stimulated small scale (SSS) model developed by shah & Ferziger were applied.The Reynolds number of the flow was taken as 10000 based on the orifice diameter and the axial velocity in the orifice.The comparison between these two models 0.1 underestimated the turbulent intersity,while the SSS model showed a better agreement with the experiment.Also the SSS model was used to investigate the development of vortex.The convective boundary condition at the outflow boundary was adopted to ensure less effect of noise on the upstream.
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