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Arc-Driven Shock Tube

Summer, '11 My Work at CePaST Jason Buchanan October 10, 2012. Arc-Driven Shock Tube. What is a Shock Tube?. Instrument used to replicate and direct blast waves. Arc-Driven ST v. Compression ST. History and Uses of Shock Tubes. 1899 Pierre Vieille 1940's Compression Shock Tube

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Arc-Driven Shock Tube

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  1. Summer, '11 My Work at CePaST Jason Buchanan October 10, 2012 Arc-Driven Shock Tube

  2. What is a Shock Tube? • Instrument used to replicate and direct blast waves. • Arc-Driven ST v. Compression ST

  3. History and Uses of Shock Tubes • 1899 Pierre Vieille • 1940's Compression Shock Tube • 1966 Blast/Electric Shock Tube • Scientific, biomedical & military applications • Analyzing flow characteristics, blast resistances, wave fronts, plasma, aerodynamic theory • Can be used like a wind tunnel

  4. Shape of the plasma

  5. CST Pressure driver with diaphragm Speeds up to Mach 30 Laminar flow Characteristics ADST • High-capacitance electric driver • Speeds up to Mach 130 • Turbulent flow

  6. Why? No contamination Need airtight system So how do we get there? Vacuum systems • Mean free path • Turbomolecular + Roughing Pumps • Ion gauge • Baking

  7. What holds us back? Virtual leaks • Screws • O-rings (rubber, copper) • Pipe corners Actual leaks • Loose parts • Cracks Outgassing

  8. My Lab Coworkers • Kyron – Professor • Brandon – Undergraduate Supervisor • Charlemagne – Laser Specialist • Jason – Big Bang Lasers • Sydney – Glow Discharge Tube • Me – Arc-Driven Shock Tube

  9. Sources • Addams, Gomez.” in which our hero accomplishes very small but significant progress in a project designed to create very small but significant pressures.” Megajoules & Gigawatts 2010 • Anderson, J.D., Modern Compressible Flow , McGraw Hill Inc., New York, 1984. • Baals, Donald. Wind Tunnels of Nasa. AMES Research Center 2004 http://www.hq.nasa.gov/pao/History/SP-440/ch6-15.htm • Slater, John W. “Shock Tubes” NPARC Alliance Validation Archive. April 2012. http://www.grc.nasa.gov/WWW/wind/valid/stube/stube.html • Varian, Inc History. Paolo Alto, California, 94304. Created 1999 • Wikipeeds, The. <en.wikipedia.org/wiki/[Shock Tube, Ultra High Vacuum Systems]> • Williams, Kyron. Assistant Professor, Department of Physics, FAMU. Center for Plasma Science & Technology • Williams, Sydney. Photographs at CePaST 2011 • Wilson, J, Schofield,D, and Regan, J. “Plasma Flow in an Electromagnetic Shock Tube and in a Compression Shock Tube.” Current Papers, Ministry of Aviation: Aeronautical Research Council. London: Her Majesty's Stationery Office. 1966

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