Silent are the caverns of the wind, But within them, a secret lies pinned Like Pandora’s box, locked up tight Holding within, a glimmer of light For in these tunnels, dreams did reside And hope for the future, they did provide But like Pandora’s box, they were lost Their secrets stolen, at a great cost …
Category Archives: Aeronautics
A Note on Critical Thinking
Miller, S. A. E., “Note on Critical Thinking,” NASA Alumni Association Magazine, Dec., 2022. pp 5. (one-page) One might visit any leading university campus in the United States and ask the graduate faculty training future researchers one question, “what is the purpose of educating students?” One of the most frequent answers is to create critical …
The NASA X-59 at AIAA SciTech 2023
AIAA SciTech 2023
This year, some of my students and collaborators are going to the AIAA SciTech conference in the DC area in the National Harbor, MD. We are presenting two particular papers. The first involves hypersonic flow-fields and the second involves acoustics and aerodynamic experiments. The citations, papers, and presentations are:
Acoustical Society of America – December 2022
This year my research group had a good showing at the Acoustical Society of America, Dec. 2022. I was happy to give a 20 minute talk myself on jet and rocket coherence and loading. My student, Dr. Alex Carr, who is now a Research Aerospace Engineering at NASA reported on his sonic boom predictions. My …
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APS Presentation – Alternative Analytical Solution for Planar Oblique Shock Waves
Abstract: One now famous analytical solution for shock waves was developed by Dr. Theodore Meyer within his Ph.D. dissertation under advisement of Professor Ludwig Prandtl. The original solution relies on analysis via control volume of the equations of motion. This approach has limited future development of analytical solutions for more complex flow-fields. In this presentation, …
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History of the Florida Aerospace Department
Professors Richard L. Fearn and Wei Shyy wrote a short history of my department [link] – Department of Mechanical and Aerospace Engineering at University of Florida. Previously, it was a stand-alone aerospace department that merged. It is worth reading and sharing if you have a connection to UF Aerospace. [link]
Mythologists and Theologians
“Mythologists and experimental theologians are needed for the development of a new method of attack” Telegram to Meyer while in trenches after recovery which was mistranslated from “Meteorologists and experimental physicists,” where Meyer then traveled and met Fritz Haber (german gas warfar pioneer)
The prediction of cross-spectra from first mode instability waves within high-speed flow over sharp and blunt cones with plasma actuation
Abstract: Leading edge geometries, such as cones, moving at high-speed undergo intense loading due to the growth of instability waves and turbulent transition. These instability waves are highly spatially coherent. Aerodynamic loading related to instability waves and transition cause large-amplitude vibrations within the underlying structure, which may lead to flight-vehicle failure. We examine the effect …
On Lift
It’s easy to explain how a rocket works, but explaining how a wing works takes a rocket scientist Philippe Spalart, Boeing Technical Fellow