Arc-Driven Shock Tube Summer, '11 My Work at CePaST Jason Buchanan October 10, 2012.
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Transcript of Arc-Driven Shock Tube Summer, '11 My Work at CePaST Jason Buchanan October 10, 2012.
Arc-Driven Shock Tube
Summer, '11 My Work at CePaST
Jason BuchananOctober 10, 2012
What is a Shock Tube?
Instrument used to replicate and direct blast Instrument used to replicate and direct blast waves.waves.
Arc-Driven ST v. Compression STArc-Driven ST v. Compression ST
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
Shape of the plasma
Characteristics
ADST High-capacitance
electric driver Speeds up to Mach
130 Turbulent flow
CST Pressure driver with
diaphragm Speeds up to Mach
30 Laminar flow
So how do we get there?
Vacuum systems Mean free path Turbomolecular +
Roughing Pumps Ion gauge Baking
Why? No contamination Need airtight system
What holds us back?
Virtual leaks Screws O-rings (rubber, copper) Pipe corners
Actual leaks Loose parts Cracks
Outgassing
My Lab Coworkers Kyron – Professor Brandon – Undergraduate Supervisor Charlemagne – Laser Specialist Jason – Big Bang Lasers Sydney – Glow Discharge Tube Me – Arc-Driven Shock Tube
Sources
Addams, Gomez.” in which our hero accomplishes very small but significant progress in a project Addams, Gomez.” in which our hero accomplishes very small but significant progress in a project designed to create very small but significant pressures.” designed to create very small but significant pressures.” Megajoules & Gigawatts 2010 Megajoules & Gigawatts 2010
Anderson, J.D., Modern Compressible Flow , McGraw Hill Inc., New York, 1984.Anderson, J.D., Modern Compressible Flow , McGraw Hill Inc., New York, 1984.
Baals, Donald. Baals, Donald. Wind Tunnels of NasaWind Tunnels of Nasa. AMES Research Center 2004 . AMES Research Center 2004 http://www.hq.nasa.gov/pao/History/SP-440/ch6-15.htmhttp://www.hq.nasa.gov/pao/History/SP-440/ch6-15.htm
Slater, John W. “Shock Tubes” NPARC Alliance Validation Archive. April 2012. Slater, John W. “Shock Tubes” NPARC Alliance Validation Archive. April 2012. http://www.grc.nasa.gov/WWW/wind/valid/stube/stube.htmlhttp://www.grc.nasa.gov/WWW/wind/valid/stube/stube.html
Varian, Inc History. Paolo Alto, California, 94304. Created 1999Varian, Inc History. Paolo Alto, California, 94304. Created 1999
Wikipeeds, The. <en.wikipedia.org/wiki/[Shock Tube, Ultra High Vacuum Systems]>Wikipeeds, The. <en.wikipedia.org/wiki/[Shock Tube, Ultra High Vacuum Systems]>
Williams, Kyron. Assistant Professor, Department of Physics, FAMU. Center for Plasma Science & Williams, Kyron. Assistant Professor, Department of Physics, FAMU. Center for Plasma Science & TechnologyTechnology
Williams, Sydney. Photographs at CePaST 2011Williams, Sydney. Photographs at CePaST 2011
Wilson, J, Schofield,D, and Regan, J. “Plasma Flow in an Electromagnetic Shock Tube and in a 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. Compression Shock Tube.” Current Papers, Ministry of Aviation: Aeronautical Research Council. London: Her Majesty's Stationery Office. 1966London: Her Majesty's Stationery Office. 1966