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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Aero Optic Characterization of Highly Turbulent Free Shear Layers Over a Backward Facing Step

McGinnis, David C. 14 October 2013 (has links)
No description available.
2

Hypersonic Aero-Optic Measurements in a High-Pressure Shock Tube

McGaunn, Jonathan P 01 January 2023 (has links) (PDF)
The high-pressure shock tube facility (HiPER-STAR) at the University of Central Florida (UCF) is analyzed experimentally to demonstrate the practicality of hypersonic aero-optical testing in an impulse facility without the use of an expansion nozzle or acceleration tube. The investigation analyses driver gas blending with helium and hydrogen to raise the speed of sound ratio in an attempt to increase the Mach number for aero-optics testing. HiPER-STAR has a unique ability to withstand pressures up to 1000 atm and run in a double diaphragm configuration allowing for a significant pressure differential to be created between the driver and driven sections. Results from this study show that hydrogen and helium blending can drastically increase the maximum Mach number of HiPER-STAR; Mach numbers up to 15 were generated at a variety of altitudes. Experiment test time varied on shock velocity but was purely dependent on the arrival of the reflected shock wave to measurement locations. The aero-optics data that was collected and visually captured with a high-speed camera clearly shows beam aberration due to density gradients and a diminishing light intensity indicating that hypersonic aero-optical phenomenon can be captured reliably and repeatedly with a shock tube.

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