Experimental and numerical studies of helium-cooled modular divertors with multiple jets
Abstract
As part of the US-Japan PHENIX program, the helium-cooled modular divertor with multiple jets (HEMJ) and a simpler “flat” variant were experimentally studied in a closed helium loop with a redesigned test chamber at coolant inlet temperatures as great as 425 °C, incident heat fluxes as great as 2.2 MW/m2 and prototypical inlet pressures of ~10 MPa. The data were used to develop correlations for the average Nusselt number and loss coefficient for a range of mass flow rates; these correlations were used in turn to predict the thermal-hydraulic performance of a single divertor module at prototypical conditions. The experimental results suggest that a flat jet array with six holes surrounding one central hole, all of the same diameter, can provide similar average heat transfer coefficients as the HEMJ divertor, albeit with higher pumping power requirements. Because of its smaller cooled surface area, however, this design has lower maximum allowable heat fluxes compared with the HEMJ divertor. Nevertheless, the flat variant could potentially simplify manufacturing and reduce the costs required to fabricate O(106) “finger” modules.
- Authors:
-
- Georgia Institute of Technology, Atlanta, GA (United States)
- Publication Date:
- Research Org.:
- Georgia Institute of Technology, Atlanta, GA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1609371
- Grant/Contract Number:
- FG02-01ER54656
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fusion Engineering and Design
- Additional Journal Information:
- Journal Volume: 136; Journal Issue: A; Journal ID: ISSN 0920-3796
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Zhao, Bailey, Musa, Shekaib, Abdel-Khalik, Said, and Yoda, Minami. Experimental and numerical studies of helium-cooled modular divertors with multiple jets. United States: N. p., 2018.
Web. doi:10.1016/j.fusengdes.2017.12.028.
Zhao, Bailey, Musa, Shekaib, Abdel-Khalik, Said, & Yoda, Minami. Experimental and numerical studies of helium-cooled modular divertors with multiple jets. United States. https://doi.org/10.1016/j.fusengdes.2017.12.028
Zhao, Bailey, Musa, Shekaib, Abdel-Khalik, Said, and Yoda, Minami. Tue .
"Experimental and numerical studies of helium-cooled modular divertors with multiple jets". United States. https://doi.org/10.1016/j.fusengdes.2017.12.028. https://www.osti.gov/servlets/purl/1609371.
@article{osti_1609371,
title = {Experimental and numerical studies of helium-cooled modular divertors with multiple jets},
author = {Zhao, Bailey and Musa, Shekaib and Abdel-Khalik, Said and Yoda, Minami},
abstractNote = {As part of the US-Japan PHENIX program, the helium-cooled modular divertor with multiple jets (HEMJ) and a simpler “flat” variant were experimentally studied in a closed helium loop with a redesigned test chamber at coolant inlet temperatures as great as 425 °C, incident heat fluxes as great as 2.2 MW/m2 and prototypical inlet pressures of ~10 MPa. The data were used to develop correlations for the average Nusselt number and loss coefficient for a range of mass flow rates; these correlations were used in turn to predict the thermal-hydraulic performance of a single divertor module at prototypical conditions. The experimental results suggest that a flat jet array with six holes surrounding one central hole, all of the same diameter, can provide similar average heat transfer coefficients as the HEMJ divertor, albeit with higher pumping power requirements. Because of its smaller cooled surface area, however, this design has lower maximum allowable heat fluxes compared with the HEMJ divertor. Nevertheless, the flat variant could potentially simplify manufacturing and reduce the costs required to fabricate O(106) “finger” modules.},
doi = {10.1016/j.fusengdes.2017.12.028},
journal = {Fusion Engineering and Design},
number = A,
volume = 136,
place = {United States},
year = {Tue Jan 02 00:00:00 EST 2018},
month = {Tue Jan 02 00:00:00 EST 2018}
}
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Figures / Tables:
Fig. 1: Cross-section (left) and picture (right) of the HEMJ test section. Dimensions in mm.
Works referenced in this record:
He-cooled divertor for DEMO: Status of development and HHF tests
journal, December 2010
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An Experimental Study of the Helium-Cooled Modular Divertor with Multiple Jets at Nearly Prototypical Conditions
journal, October 2015
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Works referencing / citing this record:
Thermal Hydraulics of Helium-Cooled Finger-Type Divertors at Higher Incident Heat Fluxes
journal, May 2019
- Lee, D. S.; Musa, S. A.; Abdel-Khalik, S. I.
- Fusion Science and Technology, Vol. 75, Issue 8
Figures / Tables found in this record: