Jets and Acoustics

Jets are free shear layers harboring a rich set of physical phenomena including vorticity dynamics, turbulent mixing and acoustic emissions. 

We utilize experimentally anchored high-fidelity simulations to understand the evolution of coherent structures and fine-scale turbulence in low-subsonic to high supersonic operating conditions. 

These studies are of relevance to thrust and noise control in commercial turbofan as well as military-style turbojet engines.

Exhaust jets produce a lot of sound

A first principle-based noise source identification and control is still an active field of research

We use a novel fluid-thermodynamic (FT) decomposition to delineate the feeble but highly detrimental acoustic component from the more energetic hydrodynamic component

This makes quantification of sound and identification of its sources significantly easier, and even yields insight into its controllability