Abstract
A hybrid jet noise prediction method combining steady and unsteady flow calculations is discussed. The main objective is to merge advantages of each technique to obtain a robust acoustic prediction tool, which will be able to correctly evaluate design and installation effects such as chevron nozzles or jet‐pylon interaction for instance. The low‐frequency component of acoustic spectra is computed using large‐eddy simulations and the integral formulation derived by Ffowcs‐Williams & Hawkings (1969, Phil. Trans. Roy. Soc. Lond., vol. 264). The high‐frequency component associated with fine scale turbulence is obtained thanks to Tam & Auriault's mixing noise theory (1999, AIAA Journal, vol. 37) from Reynolds‐Averaged Navier‐Stokes simulations. The oral presentation will detail the two methods, the LES simulations for subsonic round single and coaxial jets, and the matching between the two approaches to get a complete picture of the acoustic spectra.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
