Effect of plasma torch feedstock on ignition characteristics in supersonic flow

Keniehi Takita, Fumio Takatori, Goro Masuya

Research output: Contribution to conferencePaperpeer-review

5 Citations (Scopus)


The behaviors of plasma torches in supersonic airflow were analytically and numerically investigated. Moreover, a spectroscopic measurement by a spectrum meter was conducted. When thermoehemical equilibrium and different efficiencies of energy conversion for each species were presumed, the ranges of radical concentrations and temperatures of various kinds of feedstocks at injection were within the ranges between a pure N2 plasma torch and a pure O2 one. The N radical supplied by a N2 plasma jet (PJ) were quickly converted to O radicals downstream in the twodimensional simulation. The formation of radicals in the PJ was confirmed by the spectroscopic measurement, and the amount of radicals increased with the electric power input of the PJ. The region where the O radical supplied from the O2 PJ existed downstream of the PJ was larger than that of N radical supplied from the N2 PJ, and this tendancy was also obtained in numerical result. However, it was revealed by spectroscopic measurement that such region was very small even for the O2 PJ. The numerical analysis in two-dimension overestimated such effective region of radicals.

Original languageEnglish
Publication statusPublished - 2000 Jan 1
Event36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2000 - Huntsville, AL, United States
Duration: 2000 Jul 162000 Jul 19


Conference36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2000
Country/TerritoryUnited States
CityHuntsville, AL

ASJC Scopus subject areas

  • Space and Planetary Science
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering


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