skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Experimental Studies of High-Speed Liquid Films on Downward-Facing Surfaces for Inertial Fusion Energy Wet Wall Concepts

Abstract

The fusion event in inertial fusion energy (IFE) reactors creates neutrons, photons, and charged particles that can damage the chamber first walls. The Prometheus design study used a high-speed thin film of molten lead injected tangential to the wall to protect the upper endcap of the reactor chamber from damaging X rays and target debris. To assure full chamber coverage, the film must remain attached. Film detachment under the influence of gravity is most likely to occur on the downward-facing surfaces over the upper endcap of the reactor chamber. Accurate numerical predictions of detachment length are effectively impossible in this turbulent flow because of difficulties in determining appropriate boundary conditions near the detachment point.As part of the ARIES-IFE study, experimental investigations of high-speed water films injected onto downward-facing planar surfaces at angles of inclination up to 45 deg below the horizontal were therefore performed. The initial growth and subsequent detachment of films with initial thickness up to 2 mm and injection speed up to 11 m/s were measured. To our knowledge, these experiments are the first to investigate the detachment of turbulent liquid films on downward-facing surfaces. The implications of these initial results on thin liquid protection and the 'wetmore » wall' concept are discussed.« less

Authors:
; ; ; ;  [1]
  1. Georgia Institute of Technology (United States)
Publication Date:
OSTI Identifier:
20845908
Resource Type:
Journal Article
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 43; Journal Issue: 3; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1536-1055
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOUNDARY CONDITIONS; CHARGED PARTICLES; DESIGN; FIRST WALL; GRAVITATION; ICF DEVICES; INERTIAL CONFINEMENT; INERTIAL FUSION DRIVERS; NEUTRONS; PHOTONS; SAFETY; SURFACES; THIN FILMS; TURBULENT FLOW; VELOCITY

Citation Formats

Anderson, Jonathan K, Durbin, II, Samuel G, Sadowski, Dennis L, Yoda, Minami, and Abdel-Khalik, Said I. Experimental Studies of High-Speed Liquid Films on Downward-Facing Surfaces for Inertial Fusion Energy Wet Wall Concepts. United States: N. p., 2003. Web.
Anderson, Jonathan K, Durbin, II, Samuel G, Sadowski, Dennis L, Yoda, Minami, & Abdel-Khalik, Said I. Experimental Studies of High-Speed Liquid Films on Downward-Facing Surfaces for Inertial Fusion Energy Wet Wall Concepts. United States.
Anderson, Jonathan K, Durbin, II, Samuel G, Sadowski, Dennis L, Yoda, Minami, and Abdel-Khalik, Said I. 2003. "Experimental Studies of High-Speed Liquid Films on Downward-Facing Surfaces for Inertial Fusion Energy Wet Wall Concepts". United States.
@article{osti_20845908,
title = {Experimental Studies of High-Speed Liquid Films on Downward-Facing Surfaces for Inertial Fusion Energy Wet Wall Concepts},
author = {Anderson, Jonathan K and Durbin, II, Samuel G and Sadowski, Dennis L and Yoda, Minami and Abdel-Khalik, Said I},
abstractNote = {The fusion event in inertial fusion energy (IFE) reactors creates neutrons, photons, and charged particles that can damage the chamber first walls. The Prometheus design study used a high-speed thin film of molten lead injected tangential to the wall to protect the upper endcap of the reactor chamber from damaging X rays and target debris. To assure full chamber coverage, the film must remain attached. Film detachment under the influence of gravity is most likely to occur on the downward-facing surfaces over the upper endcap of the reactor chamber. Accurate numerical predictions of detachment length are effectively impossible in this turbulent flow because of difficulties in determining appropriate boundary conditions near the detachment point.As part of the ARIES-IFE study, experimental investigations of high-speed water films injected onto downward-facing planar surfaces at angles of inclination up to 45 deg below the horizontal were therefore performed. The initial growth and subsequent detachment of films with initial thickness up to 2 mm and injection speed up to 11 m/s were measured. To our knowledge, these experiments are the first to investigate the detachment of turbulent liquid films on downward-facing surfaces. The implications of these initial results on thin liquid protection and the 'wet wall' concept are discussed.},
doi = {},
url = {https://www.osti.gov/biblio/20845908}, journal = {Fusion Science and Technology},
issn = {1536-1055},
number = 3,
volume = 43,
place = {United States},
year = {Thu May 15 00:00:00 EDT 2003},
month = {Thu May 15 00:00:00 EDT 2003}
}