Pressure Distribution and Basic Properties of Gas Tunnel Type Plasma Jet Torch(Welding Physics, Process & Instrument)
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The basic characteristics of a gas tunnel type plasma jet which is ejected into the open air are experimentally investigated. To clarify the properties of the gas tunnel along the center axis, the pressure in the vortex chamber of the torch is measured in the absence of the plasma jet. The pressure in the gas tunnel is a very low of 200 Torr along the center axis with a gas divertor nozzle 4-8mm in diameter. The plasma jet produced in this low-pressure gas tunnel is longer than a conventionally-produced jet and has superior characters as follows. It has an extremely positive volt-ampere characteristic, and very high potential gradient, such as 40V/cm at 400A when a gas divertor nozzle 4min in diameter is used.
- Transactions of JWRI
Transactions of JWRI 14(2), 235-239, 1985-12