Measurements of Plasma Flow Velocity in DC Plasma Jets Using Perpendicular and Parallel Mach Probes

A rotating electric probe system has been developed to measure the parameters of spray plasma jets from a dc plasma torch at atmospheric pressure. Four different types of unmagnetized single probes have been used for the diagnostics of high power-flux plasma–two probes are mutually perpendicular (`p...

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Bibliographic Details
Published in:JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP 1995, Vol.34 (8A), p.4217-4222, Article 4217
Main Authors: Chung, Kyu-Sun, Hong, Sang-Hee, Chung, Kie-Hyung
Format: Article
Language:English
Subjects:
Electric and magnetic measurements
Exact sciences and technology
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma devices
Plasma diagnostic techniques and instrumentation
Plasma dynamics and flow
Plasma flow
magnetohydrodynamics
Plasma torches
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Summary:A rotating electric probe system has been developed to measure the parameters of spray plasma jets from a dc plasma torch at atmospheric pressure. Four different types of unmagnetized single probes have been used for the diagnostics of high power-flux plasma–two probes are mutually perpendicular (`perpendicular mach probe') and the remaining two are oppositely directed to each other (`parallel mach probe')–to measure the plasma flow velocity and density along the axial and radial directions of the plasma flame. Near the nozzle exit of a 15 kW plasma torch, plasma flow velocity, density and electron temperature are measured as ∼910 m/s, 4×10 13 cm -3 and 4.7 eV, respectively.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.34.4217