An advanced He-cooled divertor concept: Design, cooling technology, and thermohydraulic analyses with CFD

Ihli, T.; Kruessmann, R.; Ovchinnikov, I.; Norajitra, P.; Кузнецов, В. Е.; Giniyatulin, R.

doi:10.1016/j.fusengdes.2005.06.069

Cited by 41 publications

(18 citation statements)

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“…A more recent evolution of that concept is described in Ref. [2]; it makes use of a jet flow similar to the design of the finger [5,6] and T-tube [3,4] concepts to cool the heated surface. Its side and back walls are designed to minimize thermal stresses for the given flow conditions and neutron volumetric heating.…”

Section: Plate-type Conceptsmentioning

confidence: 99%

“…The finger concept has been developed in part to minimize thermal stresses and allow for higher heat flux accommodation through the use of small modular units [5,6]. Different flow configurations have been investigated, including the HEMJ (He-cooled Modular divertor with Jet cooling) and HEMS (He-cooled Modular divertor with Slot array) designs, as illustrated in Fig.…”

Section: Finger Conceptmentioning

confidence: 99%

“…In the HEMJ finger concept [5] a number of cylindrical He jets hit the cooling surface, providing in this way at least the same heat transfer enhancement as the previous concepts but with lower pressure drop and simpler fabrication.…”

Section: Jet Flow Through Multiple Holesmentioning

confidence: 99%

“…They range in scale from a plate configuration with characteristic dimension of the order of 1 m [1,2], to the ARIES-CS T-tube configuration with characteristic dimension of the order of 10 cm [3,4], to the EU FZK finger concept with characteristic dimension of the order of 1.5 cm [5,6]. All these designs utilize tungsten or tungsten alloy as structural material, requiring material development to widen their operating temperature range from a low of ∼600-700 • C (governed by W ductility considerations) to enable coupling to an ODS (oxide-dispersion-strengthened) FS (ferritic steel) manifold, to a high of ∼1300 • C (governed by the W re-crystallization limit) to provide desirable high-temperature capability.…”

Section: Introductionmentioning

confidence: 99%

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Recent US activities on advanced He-cooled W-alloy divertor concepts for fusion power plants

Tillack

Raffray

Wang

et al. 2011

Fusion Engineering and Design

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Section: Plate-type Conceptsmentioning

confidence: 99%

Section: Finger Conceptmentioning

confidence: 99%

Section: Jet Flow Through Multiple Holesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent US activities on advanced He-cooled W-alloy divertor concepts for fusion power plants

Tillack

Raffray

Wang

et al. 2011

Fusion Engineering and Design

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“…The design concept with multiple helium jets is denoted as HEMJ (Helium-cooled Multiple-Jet) design. To optimize the HEMJ design, the analyses with Computational Fluid Dynamics (CFD) programs are (4/33) necessary [7]. By the help of the numerical analyses the local critical regions in the design can be identified and thus help to reduce the number of expensive experiments.…”

Section: Introductionmentioning

confidence: 99%

Effect of nozzle sizes on jet impingement heat transfer in He-cooled divertor

Končar

Norajitra

Oblak

2010

Applied Thermal Engineering

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. Effect of nozzle sizes on jet impingement heat transfer in He-cooled divertor. Applied Thermal Engineering, Elsevier, 2009, 30 (6- This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ACCEPTED MANUSCRIPT( ABSTRACTThe use of impinging jets for divertor cooling in the conceptual fusion power plant is attracting much attention due to its very high heat removal capability and moderate pumping power requirement. The latest and the most advanced divertor concept is based on modular design cooled by helium impinging jets. To reduce the thermal stresses, the plasma-facing side of the divertor is build up of numerous small cooling fingers cooled by an array of helium jets. In this study the influence of nozzle sizes on the heat transfer and flow characteristics of such cooling finger is investigated numerically. The main objective is to find an optimal size and distribution of nozzle diameters in the jet array in which the heat transfer would be the highest possible at an acceptable pressure drop through the cooling finger. Prior to nozzle diameters modification, the simulation results for the reference finger geometry were validated against high heat flux experiments. A good agreement was obtained. The nozzle diameters were then modified at two different mass flow rates (13.5 g/s and 6.8 g/s per cooling finger). The most critical design parameter of interest was the maximum thimble temperature, which is limited by the melting temperature of the filler material in the brazed finger joint. It has been found that an optimal jet arrangement should have equal nozzle diameters to reach the highest thimble temperature decrease, while keeping the pressure drop within reasonable limits.

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Helium-cooled divertor option and limitations

Yoda

2025

Fusion Energy Technology R&D Priorities

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An advanced He-cooled divertor concept: Design, cooling technology, and thermohydraulic analyses with CFD

Cited by 41 publications

References 1 publication

Recent US activities on advanced He-cooled W-alloy divertor concepts for fusion power plants

Recent US activities on advanced He-cooled W-alloy divertor concepts for fusion power plants

Effect of nozzle sizes on jet impingement heat transfer in He-cooled divertor

Helium-cooled divertor option and limitations

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