Microwave waveguide helium plasmas for electrothermal propulsion

Juergen Mueller, Michael Matthew Micci

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The absorption of microwave energy by a gas within a waveguide is being investigated for use in an electrothermal propulsion device. Plasmas created within a waveguide propagate toward the source of microwave energy and, thus, must be stabilized by some means. A very simple and highly efficient way of stabilizing the plasma is inserting a bluff body made of dielectric material, such as boron nitride, into the flow. The plasma is then stabilized in the recirculation region behind the blunt body. The coupling mechanism between microwaveenergy and waveguide plasmas was investigated to yield a quantitative understanding of the dependency of the coupling efficiency on such parameters as mass flow rate, power level, and gas pressure. Maximum coupling efficiency values up to 90% could be obtained, being a strong function of the mass flow rate. Spectroscopic measurements yielded values for the electron temperature of the stabilized plasma between 12,000 and 12,800 K.

Original languageEnglish (US)
Pages (from-to)1017-1022
Number of pages6
JournalJournal of Propulsion and Power
Volume8
Issue number5
DOIs
StatePublished - Jan 1 1992

Fingerprint

helium plasma
propulsion
helium
Propulsion
Helium
Waveguides
Microwaves
waveguides
Plasmas
plasma
microwaves
mass flow rate
Plasma filled waveguides
Flow rate
Boron nitride
Electron temperature
blunt bodies
bluff bodies
Gases
boron nitrides

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

@article{969b458eeece44b68c183368849caec8,
title = "Microwave waveguide helium plasmas for electrothermal propulsion",
abstract = "The absorption of microwave energy by a gas within a waveguide is being investigated for use in an electrothermal propulsion device. Plasmas created within a waveguide propagate toward the source of microwave energy and, thus, must be stabilized by some means. A very simple and highly efficient way of stabilizing the plasma is inserting a bluff body made of dielectric material, such as boron nitride, into the flow. The plasma is then stabilized in the recirculation region behind the blunt body. The coupling mechanism between microwaveenergy and waveguide plasmas was investigated to yield a quantitative understanding of the dependency of the coupling efficiency on such parameters as mass flow rate, power level, and gas pressure. Maximum coupling efficiency values up to 90{\%} could be obtained, being a strong function of the mass flow rate. Spectroscopic measurements yielded values for the electron temperature of the stabilized plasma between 12,000 and 12,800 K.",
author = "Juergen Mueller and Micci, {Michael Matthew}",
year = "1992",
month = "1",
day = "1",
doi = "10.2514/3.23587",
language = "English (US)",
volume = "8",
pages = "1017--1022",
journal = "Journal of Propulsion and Power",
issn = "0748-4658",
publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",
number = "5",

}

Microwave waveguide helium plasmas for electrothermal propulsion. / Mueller, Juergen; Micci, Michael Matthew.

In: Journal of Propulsion and Power, Vol. 8, No. 5, 01.01.1992, p. 1017-1022.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Microwave waveguide helium plasmas for electrothermal propulsion

AU - Mueller, Juergen

AU - Micci, Michael Matthew

PY - 1992/1/1

Y1 - 1992/1/1

N2 - The absorption of microwave energy by a gas within a waveguide is being investigated for use in an electrothermal propulsion device. Plasmas created within a waveguide propagate toward the source of microwave energy and, thus, must be stabilized by some means. A very simple and highly efficient way of stabilizing the plasma is inserting a bluff body made of dielectric material, such as boron nitride, into the flow. The plasma is then stabilized in the recirculation region behind the blunt body. The coupling mechanism between microwaveenergy and waveguide plasmas was investigated to yield a quantitative understanding of the dependency of the coupling efficiency on such parameters as mass flow rate, power level, and gas pressure. Maximum coupling efficiency values up to 90% could be obtained, being a strong function of the mass flow rate. Spectroscopic measurements yielded values for the electron temperature of the stabilized plasma between 12,000 and 12,800 K.

AB - The absorption of microwave energy by a gas within a waveguide is being investigated for use in an electrothermal propulsion device. Plasmas created within a waveguide propagate toward the source of microwave energy and, thus, must be stabilized by some means. A very simple and highly efficient way of stabilizing the plasma is inserting a bluff body made of dielectric material, such as boron nitride, into the flow. The plasma is then stabilized in the recirculation region behind the blunt body. The coupling mechanism between microwaveenergy and waveguide plasmas was investigated to yield a quantitative understanding of the dependency of the coupling efficiency on such parameters as mass flow rate, power level, and gas pressure. Maximum coupling efficiency values up to 90% could be obtained, being a strong function of the mass flow rate. Spectroscopic measurements yielded values for the electron temperature of the stabilized plasma between 12,000 and 12,800 K.

UR - http://www.scopus.com/inward/record.url?scp=0026923799&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026923799&partnerID=8YFLogxK

U2 - 10.2514/3.23587

DO - 10.2514/3.23587

M3 - Article

AN - SCOPUS:0026923799

VL - 8

SP - 1017

EP - 1022

JO - Journal of Propulsion and Power

JF - Journal of Propulsion and Power

SN - 0748-4658

IS - 5

ER -