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Title: Modelling the mass migration phenomena in partially frozen heat pipes

Liquid metal heat pipes operated at power throughputs well below their design point and with sink temperatures below the freezing temperature of the working fluid may fail as a result of the working fluid migrating to a cold region within the pipe, freezing there, and not returning to the evaporator section. Eventually, sufficient working fluid inventory may be lost to the cold region to cause a local dry-out condition in the evaporator. A joint experimental and analytical effort by the Air Force Phillips Laboratory and Los Alamos National Laboratory is underway to investigate this phenomena. This paper presents an analytical model developed to describes this phenomena. The model provides for analytic determination of heat pipe temperature profiles, freeze-front locations and mass migration rates.
Authors:
;  [1] ;  [2]
  1. Los Alamos National Lab., NM (United States)
  2. Phillips Lab., Albuquerque, NM (United States)
Publication Date:
OSTI Identifier:
10104383
Report Number(s):
LA-UR--93-3651; CONF-940101--16
ON: DE94002716
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 11. symposium on space nuclear power systems,Albuquerque, NM (United States),9-13 Jan 1994; Other Information: PBD: [1993]
Research Org:
Los Alamos National Lab., NM (United States)
Sponsoring Org:
Department of Defense, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 42 ENGINEERING; HEAT PIPES; MATHEMATICAL MODELS; LIQUID METALS; POTASSIUM; FLUID MECHANICS; SPACE POWER REACTORS; HYDRAULICS; HEAT TRANSFER NESDPS Office of Nuclear Energy Space and Defense Power Systems 210600; 420400; POWER REACTORS, MOBILE, PROPULSION, PACKAGE, AND TRANSPORTABLE; HEAT TRANSFER AND FLUID FLOW