The effects of imperfect insulator coatings on MHD and heat transfer in rectangular ducts

Ying, Alice; Gaizer, Alexander A

doi:10.1016/0920-3796(95)90178-7

Cited by 18 publications

(10 citation statements)

References 2 publications

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“…7 shows, when cracks occurred on side walls, the pressure drop increased as the cracks move towards the central plane, and the same conclusion had been obtained in Ref. [13]. When the cracks occur at the corner plane, as can be seen in Fig.…”

Section: Cracks On Side Wallssupporting

confidence: 82%

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Numerical study of MHD pressure drop in rectangular ducts with insulating coatings

Yang

Zhou

Chen

et al. 2010

Fusion Engineering and Design

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Section: Cracks On Side Wallssupporting

confidence: 82%

“…The influences of coating cracks on side walls in 2D were shown in Refs. [11,13], and Refs. [14][15][16] provided some experimental studies of effects of imperfect coatings on MHD flow.…”

Section: Introductionmentioning

confidence: 98%

Numerical study of MHD pressure drop in rectangular ducts with insulating coatings

Yang

Zhou

Chen

et al. 2010

Fusion Engineering and Design

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“…One of the examples of the self-cooled class of blankets is the US self-cooled lithium blanket with the vanadium alloy as the structural material [1,2]. Although this concept was ranked highest by the Blanket Comparison and Selection Study (BCSS) in the US [2], its further development was suspended due to low tolerance of insulating coatings to cracks and other insulation defects that are likely to occur and give raise to unacceptably high MHD pressure drop [25,26]. Mainly because of this reason, almost no considerations are given to this concept nowadays.…”

Section: Liquid Metal Blanket Conceptsmentioning

confidence: 99%

Blanket/first wall challenges and required R&D on the pathway to DEMO

Abdou

Morley

Smolentsev

et al. 2015

Fusion Engineering and Design

283

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a b s t r a c tThe breeding blanket with integrated first wall (FW) is the key nuclear component for power extraction, tritium fuel sustainability, and radiation shielding in fusion reactors. The ITER device will address plasma burn physics and plasma support technology, but it does not have a breeding blanket. Current activities to develop "roadmaps" for realizing fusion power recognize the blanket/FW as one of the principal remaining challenges. Therefore, a central element of the current planning activities is focused on the question: what are the research and major facilities required to develop the blanket/FW to a level which enables the design, construction and successful operation of a fusion DEMO? The principal challenges in the development of the blanket/FW are: (1) the Fusion Nuclear Environment -a multiple-field environment (neutrons, heat/particle fluxes, magnetic field, etc.) with high magnitudes and steep gradients and transients; (2) Nuclear Heating in a large volume with sharp gradients -the nuclear heating drives most blanket phenomena, but accurate simulation of this nuclear heating can be done only in a DT-plasma based facility; and (3) Complex Configuration with blanket/first wall/divertor inside the vacuum vessel -the consequence is low fault tolerance and long repair/replacement time.These blanket/FW development challenges result in critical consequences: (a) non-fusion facilities (laboratory experiments) need to be substantial to simulate multiple fields/multiple effects and must be accompanied by extensive modeling; (b) results from non-fusion facilities will be limited and will not fully resolve key technical issues. A DT-plasma based fusion nuclear science facility (FNSF) is required to perform "multiple effects" and "integrated" experiments in the fusion nuclear environment; and (c) the Reliability/Availability/Maintainability/Inspectability (RAMI) of fusion nuclear components is a major challenge and is one of the primary reasons why the blanket/FW will pace fusion development toward a DEMO.This paper summarizes the top technical issues and elucidates the primary challenges in developing the blanket/first wall and identifies the key R&D needs in non-fusion and fusion facilities on the path to DEMO.Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

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“…However, fabrication of thin insulating coatings with desirable insulation characteristics is still questionable. A critical phenomenon that can limit the applicability of such coatings is penetration of liquid metal through the microscopic defects (cracks) in the coating, thus resulting in a direct electrical contact between the liquid and the electrically conducting walls [2][3][4]. Another potentially attractive approach is based on fabrication of multi-layer coatings [5].…”

Section: Introductionmentioning

confidence: 99%

Code development for analysis of MHD pressure drop reduction in a liquid metal blanket using insulation technique based on a fully developed flow model

Smolentsev

Morley

Abdou

2005

Fusion Engineering and Design

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The effects of imperfect insulator coatings on MHD and heat transfer in rectangular ducts

Cited by 18 publications

References 2 publications

Numerical study of MHD pressure drop in rectangular ducts with insulating coatings

Numerical study of MHD pressure drop in rectangular ducts with insulating coatings

Blanket/first wall challenges and required R&D on the pathway to DEMO

Code development for analysis of MHD pressure drop reduction in a liquid metal blanket using insulation technique based on a fully developed flow model

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