I send you, below, two references about your petition:
- Investigation of high frequency noise generation in the near-nozzle region of a jet using large eddy simulation. By: Ali Uzun · M. Yousuff Hussaini. Theor. Comput. Fluid Dyn. (2007) 21: pp. 291–321. DOI 10.1007/s00162-007-0048-z.
- PREDICTION OF NOISE GENERATED BY A ROUND NOZZLE JET FLOW USING COMPUTATIONAL AEROACOUSTICS. Authors: ALI UZUN and M. YOUSUFF HUSSAINI, J. Comp. Acous. 19, 291 (2011). DOI: 10.1142/S0218396X11004365.