Videos

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Dr. Jon Black Lunch-n-Learn

Filed under the keywords
An album containing 5 videos.

Dr Black is the new Director for the Center for Space Research and Assurance at AFIT. He is an Associate Professor of Aerospace Engineering within the Aeronautics and Astronautics department at AFIT. He holds a BS in Industrial Engineering from the University of Illinois at Urbana-Champaign in 2001 and a MS Mechanical and Aerospace Engineering, Joint Institute for Advancement of Flight Sciences (joint NASA Langley Research Center and George Washington University program) in 2003. He received his PhD in Mechanical Engineering from the University of Kentucky in 2006. Dr.

Flow Visualization in Dragonfly Flight

Filed under the keywords

Flowing seed point visualization is used to capture leading edge vortex formation, attachment and shedding as well as forewing-hindwing wake interaction in the simulated flow around a pair of digitally reconstructed dragonfly wings. Seed points are injected into the flow at chordwise cuts 75% from the wing roots and advected over time while streamlines are integrated in the instantaneous vector fields. The camera’s focal point is fixed to the forewing root while the camera moves to remain approximately parallel to the forewing’s leading edge.

Rotary Engine Flame Tracking

Filed under the keywords

The visualization of flame propagation in Stratified Charge Rotary Engine aids in combusting tracking. By using three chambers it is possible to view the interactions between the chambers.

Stratified Wavy Flow

Filed under the keywords

Stratified wavy flow of R134a in a horizontal 7mm ID Channel. Video taken at 1000fps and played back at 16 fps. Entire 27 second video represents about one half of a second of flow.

Death throes of a micro-pulsed plasma thruster

Filed under the keywords

The video depicts the spark formation of a Micro-Pulsed Plasma Thruster as the thruster ceases to operate properly. The video is taken at 1 million frames per second. For scale, the thruster is only 3.1 mm in diameter.

Detonation diffraction

Filed under the keywords

A stably propagating detonation wave transitioning around a corner. The top video is a peak pressure histogram which shows the cellular structure of the transverse waves. The middle video is the instantaneous pressure and third video is the instantaneous temperature. Note the explosion that occurs in the bottom left corner that reignites the detonation.

Explosion in space

Filed under the keywords

Slow motion video of the chaos of a latex balloon burst at 93,000 ft. Lighting effects are caused by the dynamics of the package rotating relative to the sun. The blackness of space can be seen, as this happened above 99% of the Earth’s atmosphere. Video from the payload of an experiment launched by the Wright State University High Altitude Balloon team. More info at: http://www.cs.wright.edu/balloon.

Understanding vortex formation of biolocomotion in nature

Filed under the keywords

This video is of a direct numerical simulation (DNS) of unsteady vortex formation of a dragonfly in take-off flight. The dragonfly kinematics were reconstructed from data that was collected using 3 High-Speed Cameras to record the motion in a 3-axis coordinate system.

Surprise Twist

Filed under the keywords

A video of particles passing over a plunging airfoil, modeled using a 2D unsteady vortex particle method.

Col Wissler Lunch-n-Learn

Filed under the keywords

Col Wissler highlights AFRL's capabilities-based investments and shows how four specific technology programs fit into those capabilities. Specifically, he discusses micro air vehicles, hypersonics flight experiments with the Australians, structurally integrated apertures, and cooperative operations and control of UAVs for urban ISR.