Graduate Student Garrison S. Osborne and Steven A. E. MillerUniversity of Florida Department of Mechanical and Aerospace Engineering Well before the loss of Columbia, the NASA Office of Technology Assessment wrote, “Shuttle reliability is uncertain, but has been estimated to range between 97 and 99 percent. If the Shuttle reliability is 98 percent, there would …
Continue reading “Reflection on Twenty Years Since the Loss of Columbia”
My student presented his MS thesis on the aerodynamics and aeroacoustics of rotors. Abstract: Electric vertical take-off and landing (eVTOL) aircraft are characterized by their unconventional wing and electric rotor configurations, which involve both side-by-side and tandem rotor configurations. These configurations create unique aerodynamic and aeroacoustic flow-fields. We numerically investigate the interaction effects between rotor …
Continue reading “Aeroacoustic and Aerodynamic Interaction Effects Between eVTOL Rotors”
Artificial intelligence (AI) is changing all aspects of our lives, much like the internet did when it became widely available to consumers in the mid-1990s. There are many discussions about how the AI revolution has affected different areas, including the workplace, art, culture, writing, and academics. Recently, the “ChatGPT: Optimizing Language Models for Dialogue” has …
Continue reading “On Large Language Models (AI) and Aerospace Education”
I am obsessed with pressure, particularly the internal pressure of fluids. Unlike viscosity, it is absent of frictional forces, and it is a key driving force in both human behavior and aerospace flows. Pressure is an essential component of a perfect fluid and appears on the right-hand side of the Navier-Stokes equations. Without pressure, fluid …
My student, Dr. Tianshu Zhang, and myself recently published a modified long range acoustic propagation model that handles turbulence in the atmosphere. The abstract is We present a semi-empirical long-range low-frequency acoustic propagation model, which accounts for atmospheric turbulence. Ostashev and Wilson’s scattering model is combined with a ray-theory based refraction model to account for …
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 …
