MAE Seminar: Jet Noise Simulations – Towards Noise Control

Date/Time

02/05/2019
4:00 pm-5:00 pm
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Location

303 MAE-A
939 Sweetwater Drive
Gainesville, FL 32611

Details

Jet Noise Simulations – Towards Noise Control
Tasos Lyrintzis, Ph.D.
Distinguished Professor of Aerospace Engineering
and Chair of the Department of Aerospace
Engineering Embry-Riddle Aeronautical University

Abstract
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 used for evaluating various noise control strategies, including chevrons, beveling and fluidic injections.

Biography
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. Lyrintzis’ 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 64 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 coorganized 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.

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