noise sources for wind turbine airfoils and jet exhaust nozzles is critical to delivering the next generation of “green,” low-noise wind turbines and jet engines. Scientists at GE Global Research (GEGR) are leveraging the Argonne Leadership Computing Facility (ALCF) and Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program to develop/ prove hi-fidelity direct-from-first-principles predictions of noise to characterize these hard-to-measure acoustic sources. A scalable, compressible Large Eddy Simulation (LES)–based Computational Aeroacoustics (CAA) solver is being used to study free-shear layer noise from jet exhaust nozzles and boundary layer noise sources from airfoils. GE’s LES strategy pushes application/validation to realistic conditions and scale, addresses fundamental physics and source characterization challenges, and extends capability to handle complex system interactions. Powered by scalability improvements at the ALCF, earlier INCITE work demonstrated how this first-principles-based LES capability can transform product development.