Plasma fluctuations in a flow field with a steep increase in static pressure in a closed cycle disk MHD generator

Kazumi Tsunoda, Motofumi Tanaka, Shigeharu Kabashima

Research output: Contribution to journalArticle

Abstract

Plasma fluctuations in a flow field with a steep increase in static pressure in a closed cycle disk magnetohydrodynamic (MHD) generator, caused by varying the pressure at the channel exit, were examined by means of a quasi-one-dimensional numerical simulation. In order to compute the plasma properties at the exit boundary for subsonic flow, the characteristic theory where the effects of the MHD interaction are taken into account was developed. The computational results indicated that the fluctuations of the gas dynamic and electrical properties propagated upstream at a speed of sound relative to the local plasma flow velocity. The time variation of the output Hall voltage due to the application of pressure pulse decreased with time and, finally, the Hall voltage reached almost the same level as that for the steady-state.

Original languageEnglish
Pages (from-to)3009-3016
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume63
Issue number613
Publication statusPublished - 1997 Sep
Externally publishedYes

Fingerprint

Magnetohydrodynamic converters
magnetohydrodynamic generators
closed cycles
static pressure
Flow fields
flow distribution
Plasmas
subsonic flow
Plasma flow
Subsonic flow
pressure pulses
Gas dynamics
gas dynamics
Acoustic wave velocity
Electric potential
electric potential
magnetohydrodynamic flow
Magnetohydrodynamics
Flow velocity
dynamic characteristics

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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abstract = "Plasma fluctuations in a flow field with a steep increase in static pressure in a closed cycle disk magnetohydrodynamic (MHD) generator, caused by varying the pressure at the channel exit, were examined by means of a quasi-one-dimensional numerical simulation. In order to compute the plasma properties at the exit boundary for subsonic flow, the characteristic theory where the effects of the MHD interaction are taken into account was developed. The computational results indicated that the fluctuations of the gas dynamic and electrical properties propagated upstream at a speed of sound relative to the local plasma flow velocity. The time variation of the output Hall voltage due to the application of pressure pulse decreased with time and, finally, the Hall voltage reached almost the same level as that for the steady-state.",
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AU - Tsunoda, Kazumi

AU - Tanaka, Motofumi

AU - Kabashima, Shigeharu

PY - 1997/9

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AB - Plasma fluctuations in a flow field with a steep increase in static pressure in a closed cycle disk magnetohydrodynamic (MHD) generator, caused by varying the pressure at the channel exit, were examined by means of a quasi-one-dimensional numerical simulation. In order to compute the plasma properties at the exit boundary for subsonic flow, the characteristic theory where the effects of the MHD interaction are taken into account was developed. The computational results indicated that the fluctuations of the gas dynamic and electrical properties propagated upstream at a speed of sound relative to the local plasma flow velocity. The time variation of the output Hall voltage due to the application of pressure pulse decreased with time and, finally, the Hall voltage reached almost the same level as that for the steady-state.

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