Plenary Lecture

Jet Noise Simulations Utilizing Petaflop Computing

Professor Anastasios (Tasos) Lyrintzis
Distinguished Professor and Chair
Aerospace Engineering
Embry-Riddle Aeronautical University
Daytona Beach, FL, USA
E-mail: lyrintzi@erau.edu

Abstract: Processing speeds and memory limitations of existing supercomputers limit the faithfulness of many simulations. Thus these simulations are not accurate enough to allow design and optimization of important devices. In order to simulate realistic situations very fine grids (e.g. on the order of tens of billions of points) are sometimes needed, requiring petascale computing systems. Thus new efficient algorithms are needed as well as implementation strategies that take advantage of the main characteristics of petascale architectures. One problem that can benefit petaflop computing is jet noise simulation. Jet noise is an important issue due to increased commercial air-traffic, penalty fees for noisier aircraft, and future stringent noise regulations as well as military operational requirements. Simulation of realistic conditions requires tens of billions of grid points. An efficient petascalable code has been developed based on the large eddy simulation (LES) technique is designed and implemented to simulate faithfully subsonic jet noise. Examples of large-scale simulations using up to 1 billion grid points will be given and scalability studies will be shown for up to 91,125 cores (or a theoretical speed of ~ 1 petaflop/s). It is believed that the more accurate simulations will increase our level of understanding of jet noise and pave the way for quieter designs.

Brief Biography of the Speaker: Dr. Lyrintzis joined ERAU in January of 2012 as a Distinguished Professor and chair of the Department of Aerospace Engineering. He was Purdue (1994-2011) after serving seven years on the faculties of University of Minnesota (1989-94), Cornell (1988-89) and Syracuse University (1987-88). At Purdue he was School of Aeronautics and Astronautics Associate Head for graduate programs and the Director of Purdue’s Computational Science and Engineering (CS&E) interdisciplinary program. Dr. Lyrintzis’ primary research interests are in the area of fluid dynamics with emphasis on numerical methods and applications in aero-acoustics. His research endeavors are currently supported by NSF, NASA, the US Navy. He has co-authored about 60 journal papers and more than 100 conference papers. He has advised or co-advised 16 Ph.D. and 18 M.S. students. Dr. Lyrintzis is an AIAA Associate Fellow, an ASME Fellow, and a Boeing Welliver Fellow. He has been a member of the AIAA Aero-acoustics Technical Committee (vice-chair ‘05-07, chair ‘07-09), the AHS Acoustics Committee, and the ASME Coordinating Group for CFD. He is currently an Associate editor for the AIAA Journal and the International Journal of Aero-acoustics. Finally, Dr. Lyrintzis has participated in the development of award-winning (American Helicopter Society, Howard Hughes Award, NASA Group Achievement Award) TRAC (Tilt-Rotor Aeroacoustic Codes) system of codes from NASA Langley.

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