Plasma torch igniters for a scramjet combustor

Spencer Kuo, Daniel Bivolaru, Henry Lai, Wilson Lai, S. Popovic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Development of a versatile plasma torch, which carries desirable features for being an ignition aide within a supersonic-combustor, is studied. The desirable features include 1) easy to be installed, aligned, and maintained, 2) a divergent nozzle for supersonic plasma jet, 3) an additional port for fuel injection, and 4) a microwave adaptor arrangement to couple additional power (from microwave as well as arc discharge) to the torch plasma. The plasma jet generated by this torch is described by the cycle energy of the discharge and through imaging of its plume under various conditions, combination of without and with additional microwave power and the supply gas pressure to the torch. This torch system, with its high voltage discharge, is operated in periodic (60-Hz) mode. The capacitors in the circuit of the power supply are charged at the line frequency of 60 Hz, resulting in a cyclical discharge. The cycle energy is up to 28 J. The microwave electric field has a profound effect on the arc discharge. The arc discharge is found to triple its peak power and to have significantly increased size in the presence of microwave, even though the applied microwave energy is relatively low, which is estimated to be about 8 J per cycle. The added microwave electric field outside the nozzle of the torch module also works to increase the penetration depth of torch plume into the supersonic crossflow in the combustor. This is because the microwave electric field can penetrate deeply into the combustor without being affected by the supersonic cross flow.

Original languageEnglish (US)
Title of host publication42nd AIAA Aerospace Sciences Meeting and Exhibit
Pages9408-9417
Number of pages10
StatePublished - 2004
Event42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 5 2004Jan 8 2004

Other

Other42nd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period1/5/041/8/04

Fingerprint

Plasma torches
Combustors
Microwaves
Plasma jets
Electric fields
Nozzles
Gas supply
Fuel injection
Ignition
Capacitors
Imaging techniques
Networks (circuits)
Electric potential

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kuo, S., Bivolaru, D., Lai, H., Lai, W., & Popovic, S. (2004). Plasma torch igniters for a scramjet combustor. In 42nd AIAA Aerospace Sciences Meeting and Exhibit (pp. 9408-9417)

Plasma torch igniters for a scramjet combustor. / Kuo, Spencer; Bivolaru, Daniel; Lai, Henry; Lai, Wilson; Popovic, S.

42nd AIAA Aerospace Sciences Meeting and Exhibit. 2004. p. 9408-9417.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kuo, S, Bivolaru, D, Lai, H, Lai, W & Popovic, S 2004, Plasma torch igniters for a scramjet combustor. in 42nd AIAA Aerospace Sciences Meeting and Exhibit. pp. 9408-9417, 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States, 1/5/04.
Kuo S, Bivolaru D, Lai H, Lai W, Popovic S. Plasma torch igniters for a scramjet combustor. In 42nd AIAA Aerospace Sciences Meeting and Exhibit. 2004. p. 9408-9417
Kuo, Spencer ; Bivolaru, Daniel ; Lai, Henry ; Lai, Wilson ; Popovic, S. / Plasma torch igniters for a scramjet combustor. 42nd AIAA Aerospace Sciences Meeting and Exhibit. 2004. pp. 9408-9417
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