Performance characterization of pneumatic single pellet injection system

Journal Article · Fri Apr 01 04:00:00 EST 1983 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.572162· OSTI ID:5723234

Schuresko, D D; Milora, S L; Hogan, J T; Foster, C A; Combs, S K

The Oak Ridge National Laboratory single-shot pellet injector, which has been used in plasma fueling experiments on ISX and PDX, has been upgraded and extensively instrumented in order to study the gas dyamics of pneumatic pellet injection. An improved pellet transport line was developed which utilizes a 0.3-cm-diam by 100-cm-long guide tube. Pellet gun performance was characterized by measurements of breech and muzzle dynamic pressures and by pellet velocity and mass determinations. Velocities of up to 1.4 km/s were achieved for intact hydrogen pellets using hydrogen propellant at 5-MPa breech pressure. These data have been compared with new pellet acceleration calculations which include the effects of propellant friction, heat transfer, time-dependent boundary conditions, and finite gun geometry. These results provide a basis for the extrapolation of present-day pneumatic injection system performance to velocities in excess of 2 km/s.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5723234
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 1:2; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700205 -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ACCELERATION
DIVERTORS
ELEMENTS
ENERGY TRANSFER
FABRICATION
FRICTION
FUEL INJECTION SYSTEMS
FUEL PELLETS
FUEL SYSTEMS
HEAT TRANSFER
HYDROGEN
ISX TOKAMAK
NONMETALS
PDX DEVICES
PELLETS
PERFORMANCE
PERFORMANCE TESTING
PLASMA
PNEUMATIC TRANSPORT
TESTING
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
TRANSPORT
VELOCITY