Below are items from the 39th DCASS, held 5 March 2014.
Fire in His Eyes
Tim Erdmann
Innovative Scientific Solutions Inc.
Jeff Monfort
University of Dayton Research Institute
Daniel Richardson
National Research Council
Craig Neuroth, Dale Shouse
Air Force Research Laboratory
This photo is of the flame vortex inside of a cavity in the Ultra-Compact Combustor looking through the side window showing airflow, fuel flow, and the flame vortex. The inlet condition was 500 degrees Fahrenheit and 100 psia with a 1.1 cavity equivalence ratio. The photo was taken with a handheld Canon Rebel Ti camera at 1/2500 sec, f8.0, and ISO 80.
Who Put the Pterosaur in My Inlet Diffuser!?
Darius Sanders
Air Force Research Laboratory
This is a contour of the axial component of the wall shear stress on the upper surface of a serpentine inlet diffuser. The contour range was narrowed to highlight negative values of the axial shear stress. It was used to indicate the the location and extent of the separation region on the diffuser surface.
Branches on a Winter Day
Sheena Winder
Air Force Institute of Technology
Interaction of Hafnium Diboride and Yttrium-Aluminum-Garnet in the Presence of Platinum. Al- and O-containing deposit on Pt foil after exposure to HfB2 and yttria-aluminum-garnet after 24 hrs at 1500°C in air.
Large Eddy Simulation of Mach 2.25 flow in a 2:1 duct
Nicholas Bisek
Air Force Research Laboratory
A high-order implicit Large Eddy Simulation (with 1.1 billion cells) of Mach 2.25 turbulent flow in a 2:1 duct. A trip, located at the beginning of the domain, causes the flow on each wall to rapidly transition and aids in the transition of the flow near the corner. In addition, the high resolution and 6th-order numerical scheme are able to preserve the acoustic noise generated by the turbulent boundary-layer flow as it radiates through the duct's inviscid core (as seen by the instantaneous pressure contours at the domain exit).
