A microwave-augmented plasma torch module

Spencer Kuo, Daniel Bivolaru, Skip Williams, Campbell D. Carter

Research output: Contribution to journalArticle

Abstract

A new plasma torch device which combines arc and microwave discharges to enhance the size and enthalpy of the plasma torch is described. A cylindrical-shaped plasma torch module is integrated into a tapered rectangular cavity to form a microwave adaptor at one end, which couples the microwave power injected into the cavity from the other end to the arc plasma generated by the torch module. A theoretical study of the microwave coupling from the cavity to the plasma torch, as the load, is presented. The numerical results indicate that the microwave power coupling efficiency exceeds 80%. Operational tests of the device indicate that the microwave power is coupled to the plasma torch and that the arc discharge power is increased. The addition of microwave energy enhances the height, volume and enthalpy of the plasma torch when the torch operates at a low airflow rate, and even when the flow speed is supersonic, a noticeable microwave effect on the plasma torch is observed. In addition, the present design allows the torch to be operated as both a fuel injector and igniter. Ignition of ethylene fuel injected through the centre of a tungsten carbide tube acting as the central electrode is demonstrated.

Original languageEnglish (US)
Pages (from-to)266-275
Number of pages10
JournalPlasma Sources Science and Technology
Volume15
Issue number2
DOIs
StatePublished - May 1 2006

Fingerprint

plasma torches
modules
microwaves
torches
arc discharges
cavities
microwave coupling
enthalpy
igniters
supersonic speed
tungsten carbides
injectors
plasma jets
ignition
ethylene
tubes
electrodes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

A microwave-augmented plasma torch module. / Kuo, Spencer; Bivolaru, Daniel; Williams, Skip; Carter, Campbell D.

In: Plasma Sources Science and Technology, Vol. 15, No. 2, 01.05.2006, p. 266-275.

Research output: Contribution to journalArticle

Kuo, Spencer ; Bivolaru, Daniel ; Williams, Skip ; Carter, Campbell D. / A microwave-augmented plasma torch module. In: Plasma Sources Science and Technology. 2006 ; Vol. 15, No. 2. pp. 266-275.
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