Experimental and Numerical Evaluation of the Thermal-Fluid Characteristics of the Helium-Cooled Modular Divertor with Multiple Jets Using a Reversed Heat Flux Approach
Abstract
A single-finger unit of the Helium-Cooled Modular Divertor with Multiple Jets (HEMJ) with a plasma-facing surface (PFS) area of about 2 cm2 has been studied in a helium (He) loop at He mass flow rates m˙H ≤ 8 g/s and nearly prototypical conditions. Based on previous studies of the single finger of the HEMJ, our Georgia Institute of Technology group is planning to experimentally study larger divertors. Given that the HEMJ test section was heated with an induction heater and that it is impractical to scale this up to divertors with larger PFS areas, a reversed heat flux approach is being considered to measure heat transfer coefficients (HTCs). In this approach, the direction of the heat flux is reversed with water cooling and high-temperature He heating of the outer shell attached to the PFS. This work presents an initial experimental and numerical evaluation of this approach for a single HEMJ finger. Experiments with brass and copper-chromium-zirconium outer shells were conducted at dimensionless He mass flow rates or Reynolds numbers Re = 1 × 104 to 4.7 × 104, an inlet pressure of 10 MPa, temperatures as great as 673 K, and maximum heat flux of 8.4 MW/m2. The experiments verifymore »
- 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:
- 1785278
- Grant/Contract Number:
- FG02-01ER54656
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fusion Science and Technology
- Additional Journal Information:
- Journal Volume: 77; Journal Issue: 7-8; Journal ID: ISSN 1536-1055
- Publisher:
- American Nuclear Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; helium-cooled divertor; reversed heat flux; impinging jet cooling; heat transfer coefficients
Citation Formats
Musa, S. A., Lee, D. S., Abdel-Khalik, S. I., and Yoda, M. Experimental and Numerical Evaluation of the Thermal-Fluid Characteristics of the Helium-Cooled Modular Divertor with Multiple Jets Using a Reversed Heat Flux Approach. United States: N. p., 2021.
Web. doi:10.1080/15361055.2020.1867475.
Musa, S. A., Lee, D. S., Abdel-Khalik, S. I., & Yoda, M. Experimental and Numerical Evaluation of the Thermal-Fluid Characteristics of the Helium-Cooled Modular Divertor with Multiple Jets Using a Reversed Heat Flux Approach. United States. https://doi.org/10.1080/15361055.2020.1867475
Musa, S. A., Lee, D. S., Abdel-Khalik, S. I., and Yoda, M. Tue .
"Experimental and Numerical Evaluation of the Thermal-Fluid Characteristics of the Helium-Cooled Modular Divertor with Multiple Jets Using a Reversed Heat Flux Approach". United States. https://doi.org/10.1080/15361055.2020.1867475. https://www.osti.gov/servlets/purl/1785278.
@article{osti_1785278,
title = {Experimental and Numerical Evaluation of the Thermal-Fluid Characteristics of the Helium-Cooled Modular Divertor with Multiple Jets Using a Reversed Heat Flux Approach},
author = {Musa, S. A. and Lee, D. S. and Abdel-Khalik, S. I. and Yoda, M.},
abstractNote = {A single-finger unit of the Helium-Cooled Modular Divertor with Multiple Jets (HEMJ) with a plasma-facing surface (PFS) area of about 2 cm2 has been studied in a helium (He) loop at He mass flow rates m˙H ≤ 8 g/s and nearly prototypical conditions. Based on previous studies of the single finger of the HEMJ, our Georgia Institute of Technology group is planning to experimentally study larger divertors. Given that the HEMJ test section was heated with an induction heater and that it is impractical to scale this up to divertors with larger PFS areas, a reversed heat flux approach is being considered to measure heat transfer coefficients (HTCs). In this approach, the direction of the heat flux is reversed with water cooling and high-temperature He heating of the outer shell attached to the PFS. This work presents an initial experimental and numerical evaluation of this approach for a single HEMJ finger. Experiments with brass and copper-chromium-zirconium outer shells were conducted at dimensionless He mass flow rates or Reynolds numbers Re = 1 × 104 to 4.7 × 104, an inlet pressure of 10 MPa, temperatures as great as 673 K, and maximum heat flux of 8.4 MW/m2. The experiments verify that the He-side HTCs are independent of the direction of the heat flux. Here, the results agree well with previous Nusselt number correlation and pressure loss coefficients for the HEMJ obtained using the normal heating approach.},
doi = {10.1080/15361055.2020.1867475},
journal = {Fusion Science and Technology},
number = 7-8,
volume = 77,
place = {United States},
year = {Tue Apr 27 00:00:00 EDT 2021},
month = {Tue Apr 27 00:00:00 EDT 2021}
}
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Works referenced in this record:
Recent Progress in the Development of Helium-Cooled Divertor for DEMO
journal, May 2015
- Norajitra, Prachai; Basuki, Widodo Widjaja; Giniyatulin, Radmir
- Fusion Science and Technology, Vol. 67, Issue 4
An Experimental Reversed Heat Flux Investigation of the Helium-Cooled Modular Divertor with Multiple Jets
journal, August 2019
- Musa, S. A.; Lee, D. S.; Abdel-Khalik, S. I.
- Fusion Science and Technology, Vol. 75, Issue 8
An advanced He-cooled divertor concept: Design, cooling technology, and thermohydraulic analyses with CFD
journal, November 2005
- Ihli, T.; Kruessmann, R.; Ovchinnikov, I.
- Fusion Engineering and Design, Vol. 75-79
Design Optimization of High-Performance Helium-Cooled Divertor Plate Concept
journal, August 2009
- Wang, X. R.; Malang, S.; Raffray, A. R.
- Fusion Science and Technology, Vol. 56, Issue 2
Experimental and numerical studies of helium-cooled modular divertors with multiple jets
journal, November 2018
- Zhao, Bailey; Musa, Shekaib; Abdel-Khalik, Said
- Fusion Engineering and Design, Vol. 136
A correlation of thermal conductivity data for helium
journal, December 1981
- Hands, B. A.; Arp, V. D.
- Cryogenics, Vol. 21, Issue 12
Experimental study of DEMO helium cooled divertor target mock-ups to estimate their thermal and pumping efficiencies
journal, October 2005
- Ovchinnikov, I.; Giniyatulin, R.; Ihli, T.
- Fusion Engineering and Design, Vol. 73, Issue 2-4
Interlaboratory Test on Thermophysical Properties of the ITER Grade Heat Sink Material Copper–Chromium–Zirconium
journal, October 2010
- Pintsuk, G.; Blumm, J.; Hohenauer, W.
- International Journal of Thermophysics, Vol. 31, Issue 11-12
Liquid jet impingement heat transfer with or without boiling
journal, March 1993
- Ma, C. F.; Gan, Y. P.; Tian, Y. C.
- Journal of Thermal Science, Vol. 2, Issue 1