Below are items from the 43rd DCASS, held 27 Feburary 2018.
Vortices Shedding from a Drone Rotor
Zhenyu Wang, Mei Zhuang, James Gregory, and Matthew McCrink
The Ohio State University
This figure shows the vortices shedding from the rotating blades, motor and airframe of a drone rotor at 3000rpm through the Detached Eddy Simulation (DES).
Birth of a Silica Glacier
Brian Kroger and Marina Ruggles-Wrenn
Air Force Institute of Technology
SEM micrograph of the Hi-Nicalon S specimen Air examining defects near the lower fracture surface of a fiber (700 MPa, 62.50 h).
Reborn (reburn?) of the Phoenix, "A Fire Bird"
Abdulafeez Adebiyi, V'yacheslav Akkerman, and Sinan Demir
West Virginia University
In the ancient Greek mythology, the Phoenix was a mystery bird that was born from the ashes of its predecessors through a lustrous display of flames and combustion. In the 2017, a series of computational simulations of premixed burning in obstructed channels miraculously evolves into the Phoenix reborn.
Violence - Thermo-Acoustic Combustion Instability in the
Universal Bluff-Body Flame Experiment
Brendan Paxton
Innovative Scientific Solutions Inc.
Christopher Fugger and Ethan Legge
Spectral Energies LLC
Andrew Caswell
Air Force Research Laboratory
High-speed optical image capture - 10,000 frame/sec with a color Photron SA-Z - of the excitation of a violent thermo-acoustic combustion instability on AFRL UBER (Universal Bluff Body Experimental Rig).
Drop Meets Jet
Brian Bohan and Michael Waters
Air Force Institute of Technology
This video was taken during high-speed video analysis of metallic, 3D printed nozzles flowing water. During the final test a single water droplet formed on the outside of the nozzle and fell. The droplet was pulled toward the jet where the high-speed fluid ruptured the droplet.