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Titre du document / Document title

Thermal performance and flow instabilities in a multi-channel, helium-cooled, porous metal divertor module

Auteur(s) / Author(s)

YOUCHISON Dennis L. (1) ; NORTH Mark T. (2) ; LINDEMUTH James E. (2) ; MCDONALD Jimmie M. (1) ; LUTZ Thomas J. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Sandia National Laboratories, Fusion Technology Department, P.O. Box 5860, MS-1129, Albuquerque, NM 87185, ETATS-UNIS
(2) Thermacore Inc., Lancaster, PA 17601, ETATS-UNIS

Résumé / Abstract

Pressurized helium is under consideration for cooling Langmuir probes and plasma facing components of next generation fusion experiments. Helium is non-corrosive, does not activate, separated easily from tritium, vacuum compatible, and undergoes no phase transformations. Recently, the thermal performance of a bare-copper, dual-channel, helium-cooled, porous metal divertor mock-up, designed and fabricated by Thermacore Inc., was evaluated on Sandia's 30 kW Electron Beam Test System equipped with a closed helium flow loop. The module uses short circumferential flow paths to minimize pressure drops and pumping requirements while achieving optimal thermal performance by providing a very large effective surface area. The module was tested under both uniform and non-uniform heat loads to assess the effects of mass flow instabilities. It survived a maximum absorbed heat flux of 29.5 MW/m2on a 2-cm2 area. Results on the power sharing between the two channels is presented and compared with that of a previous design. These experimental results coupled with appropriate modeling provide insight on flow instabilities in multi-channel, helium-cooled heat exchangers.

Revue / Journal Title

Fusion engineering and design    ISSN  0920-3796   CODEN FEDEEE 

Source / Source

Congrès
ISFNT-5 International Symposium on Fusion Nuclear Technology No5, Rome , ITALIE (19/09/1999)
2000, vol. 49-50 (996 p.)  (9 ref.), pp. 407-415

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1987) (Revue)

Mots-clés anglais / English Keywords

Nuclear reactor

;

Nuclear fusion reactor

;

Surface plasma interaction

;

Divertor

;

Helium

;

Porous metal

;

Flow(fluid)

;

Instability

;

Thermal efficiency

;

Heat transfer coefficient

;

Copper

;

Microstructure

;

Mots-clés français / French Keywords

Réacteur nucléaire

;

Réacteur fusion nucléaire

;

Interaction solide plasma

;

Ecorceur

;

Hélium

;

Métal poreux

;

Ecoulement

;

Instabilité

;

Rendement thermique

;

Coefficient transfert chaleur

;

Cuivre

;

Microstructure

;

Mots-clés espagnols / Spanish Keywords

Reactor nuclear

;

Reactor fusión nuclear

;

Interacción sólido plasma

;

Descortezador

;

Helio

;

Metal poroso

;

Flujo

;

Inestabilidad

;

Rendimiento térmico

;

Coeficiente transmisión calor

;

Cobre

;

Microestructura

;

Localisation / Location

INIST-CNRS, Cote INIST : 12262 F, 35400009373672.0540

Nº notice refdoc (ud4) : 849696



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