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Title: Performance of rf-assisted magnetohydrodynamics power generator

Abstract

The present paper describes the performance of a radio-frequency (rf) electromagnetic-field-assisted magnetohydrodynamics (MHD) electrical power generator and compares it to a multiple-load MHD generator. rf heating which is superimposed on self-excited Joule heating preionizes cesium-seeded helium gas independent of the in situ loading conditions, whereby Hall potential profile is improved and electron temperature is increased. Furthermore, the dynamic stabilization effect cancels ionization instability and homogenizes plasma structure, which is the most important superiority of the rf-power assistance over a conventional plasma actuation by loading-rate control. The power-generating performance is significantly improved with the aid of the rf power under wide seeding and loading conditions, where the electrical load-matching characteristic is slightly changed.

Authors:
; ;  [1]
  1. Department of Energy Sciences, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502 (Japan)
Publication Date:
OSTI Identifier:
20782365
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 12; Journal Issue: 11; Other Information: DOI: 10.1063/1.2116127; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CESIUM; COMPARATIVE EVALUATIONS; CONTROL; ELECTROMAGNETIC FIELDS; ELECTRON TEMPERATURE; HELIUM; ION TEMPERATURE; IONIZATION; JOULE HEATING; LOADING RATE; MAGNETOHYDRODYNAMICS; MHD GENERATORS; PERFORMANCE; PLASMA; PLASMA INSTABILITY; PLASMA POTENTIAL; RADIOWAVE RADIATION; RF SYSTEMS; STABILIZATION

Citation Formats

Murakami, Tomoyuki, Okuno, Yoshihiro, and Yamasaki, Hiroyuki. Performance of rf-assisted magnetohydrodynamics power generator. United States: N. p., 2005. Web. doi:10.1063/1.2116127.
Murakami, Tomoyuki, Okuno, Yoshihiro, & Yamasaki, Hiroyuki. Performance of rf-assisted magnetohydrodynamics power generator. United States. doi:10.1063/1.2116127.
Murakami, Tomoyuki, Okuno, Yoshihiro, and Yamasaki, Hiroyuki. Tue . "Performance of rf-assisted magnetohydrodynamics power generator". United States. doi:10.1063/1.2116127.
@article{osti_20782365,
title = {Performance of rf-assisted magnetohydrodynamics power generator},
author = {Murakami, Tomoyuki and Okuno, Yoshihiro and Yamasaki, Hiroyuki},
abstractNote = {The present paper describes the performance of a radio-frequency (rf) electromagnetic-field-assisted magnetohydrodynamics (MHD) electrical power generator and compares it to a multiple-load MHD generator. rf heating which is superimposed on self-excited Joule heating preionizes cesium-seeded helium gas independent of the in situ loading conditions, whereby Hall potential profile is improved and electron temperature is increased. Furthermore, the dynamic stabilization effect cancels ionization instability and homogenizes plasma structure, which is the most important superiority of the rf-power assistance over a conventional plasma actuation by loading-rate control. The power-generating performance is significantly improved with the aid of the rf power under wide seeding and loading conditions, where the electrical load-matching characteristic is slightly changed.},
doi = {10.1063/1.2116127},
journal = {Physics of Plasmas},
number = 11,
volume = 12,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2005},
month = {Tue Nov 15 00:00:00 EST 2005}
}