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Improvement of isentropic efficiency of a magnetohydrodynamic power generator by radio-frequency preionization
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10.1063/1.3068184
/content/aip/journal/jap/105/2/10.1063/1.3068184
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/2/10.1063/1.3068184
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of a shock-tunnel facility.

Image of FIG. 2.
FIG. 2.

Schematic illustration of rf power assisted MHD generator.

Image of FIG. 3.
FIG. 3.

Schematics of rf-power-assisted MHD generator. Front view (upper) and cross-sectional view (lower).

Image of FIG. 4.
FIG. 4.

Calculation region of quasi-three-dimensional numerical simulations.

Image of FIG. 5.
FIG. 5.

Time trace of typical single-shot shock-tunnel experiment. (a) Total inflow pressure , static pressure at the throat, and total inflow temperature ; (b) Hall current and intensity of radiation from cesium atom ; (c) output power and applied rf power. The period of the core interval is indicated.

Image of FIG. 6.
FIG. 6.

Radial (streamwise) distributions of (a) static pressure and (b) Hall potential . (c) Hall electric field strength , and (d) electron temperature . Left-hand side: experimental results indicated by closed [(●) rf ] and open circles [(○) without rf power]. Right-hand side: numerical results obtained for the inlet electron temperatures of 3000, 3500, and 4000 K.

Image of FIG. 7.
FIG. 7.

Numerical results of (a) inward Lorentz force indicator, an interaction parameter , (b) Joule heating , and (c) power extraction from the generator and the power consumed in the generator . The radial profiles were obtained at the inlet electron temperatures of (a) 3000 K, (b) 3500 K, and (c) 4000 K.

Image of FIG. 8.
FIG. 8.

(a) Enthalpy -entropy diagram calculated in the MHD channel for the inlet electron temperatures of 3000, 3500, and 4000 K. (b) Experimental and numerical results of IE and EER. The experimental results are indicated by closed circles for the rf-assisted case and open circles for the non-rf-assisted case. The solid curve indicates simulation results. The dashed curves represent theoretical predictions.

Image of FIG. 9.
FIG. 9.

Experimental results of EBI, EGI, and electron temperature as functions of rf power. Total inflow temperatures were (a) 2100 K and (b) 3000 K.

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/content/aip/journal/jap/105/2/10.1063/1.3068184
2009-01-21
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Improvement of isentropic efficiency of a magnetohydrodynamic power generator by radio-frequency preionization
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/2/10.1063/1.3068184
10.1063/1.3068184
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