This work is an attempt to capture the sound eld of a high Reynolds number, high Mach number subsonic jet without LES or DNS. The method used is called the SNGR (Stochastic Noise Generation and Radiation) method and was rst proposed by Bechara, Bailly, Lafon Candel and Juvé.1,2 The SNGR method is based on using the information given from a RANS solution to generate a time dependent velocity source eld which is used to evaluate source terms for the linearized Euler equations. The solution to the linearized Euler equations provide the acoustic information of the ow. This method has in the present work been further developed with a new time depen-dence and convection of the generated velocity eld. The developed method has been applied to a Mach cold jet at and compared to recent LES computations and measurements of the same jet.
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Billson et al. (2003) studied this question.