Realistic Jet Noise Simulations Including Noise Control Strategies
Professor Anastasios Lyrintzis
Embry Riddle Aeronautical University
Daytona Beach, FL, USA
Jet noise is an important part of aircraft noise, which is a critical issue due to strict noise regulations, as well as military operational requirements. We have developed an in-house LES code which features excellent scalability using highly-accurate and parallelizable numerical methods. The code is a multi-block structured solver capable of using cylindrical grids and simulating both subsonic jets and supersonic jets with shock waves. A digital filter-based approximate turbulent inflow boundary condition is used. A wall model is employed in the nozzle walls to save computational time. Finally, a ghost-point-based immersed boundary method is implemented to allow the simulation of complex nozzle shapes that show promise for noise reduction. The code has been validated and used for evaluating various noise control strategies, including chevrons, beveling and fluidic injections.
Brief Biography of the Speaker:
Dr. Lyrintzis is a Distinguished Professor and Chair of Aerospace Engineering at Embry-Riddle Aeronautical University and has also served at Purdue, University of Minnesota, Syracuse and Cornell University. Dr. Lyrintzisí primary research interests are in the area of computational aeroacoustics. His research endeavors have been supported by NSF, NASA, ARO, the US Navy and other agencies and industries. He has co-authored 65 journal and 130 conference papers and has advised 21 Ph.D. students. Dr. Lyrintzis is an AIAA Associate Fellow, an ASME Fellow, and a Boeing Welliver Fellow. He has been a member of the AIAA Aeroacoustics Technical Committee (vice-chair 05-07, chair 07-09), the AHS Acoustics Committee, the ASME Coordinating Group for CFD and ADCA (Aerospace Department Chair Association, chair 2015-17). Dr. Lyrintzis has co-organized the 10th and the 23th AIAA/CEAS Aeroacoustics Conferences Manchester UK (2004) and Denver CO (2017), as well as many Sessions and Forums in AIAA, ASME and AHS Conferences. Dr. Lyrintzis has been an Associate Editor for the AIAA Journal and the International Journal of Aeroacoustics. Finally, Dr. Lyrintzis has participated in the development of award-winning (American Helicopter Society, Howard Hughes Award, NASA Group Achievement Award) TRAC (TiltRotor Aeroacoustic Codes) system of codes from NASA Langley.