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Title: The thermohydraulic characteristics of two-phase flow in extremely narrow channels (the frictional pressure drop and heat transfer boiling two-phase flow, analytical model)

Abstract

Two-phase flow in an extremely narrow channel appears in several engineering situations. One application is the duplicated heat-exchanger pipe which is suggested as a safety device for liquid metal cooling systems in fast breeder or fusion reactors. Steam bearings are also involved in the field. In this paper, pattern, pressure drop, and heat transfer were investigated for R113 boiling two-phase flow in extremely narrow channels with a thickness of 35-110 [mu]m between horizontal parallel plates. It was clarified from the experiments that the friction multiplier of two-phase flow is well estimated by an empirical correlation proposed for adiabatic systems, and that the heat-transfer coefficient of two-phase flow is 3-20 times as large as that of the liquid single-phase flow. An analytical model based on viscous flow and the effect of the capillary number on the thickness of the liquid film is proposed. It provides an explanation for the frictional pressure drop and the heat-transfer coefficient.

Authors:
;  [1];
  1. Tokyo Inst. of Tech. (Japan). Research Lab. for Nuclear Reactors
Publication Date:
OSTI Identifier:
6003522
Resource Type:
Journal Article
Journal Name:
Heat Transfer - Japanese Research; (United States)
Additional Journal Information:
Journal Volume: 21:8; Journal ID: ISSN 0096-0802
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HEAT EXCHANGERS; TWO-PHASE FLOW; LMFBR TYPE REACTORS; ENGINEERED SAFETY SYSTEMS; PIPES; THERMONUCLEAR REACTORS; BOILING; FLOW MODELS; HEAT TRANSFER; PRESSURE DROP; VISCOUS FLOW; BREEDER REACTORS; ENERGY TRANSFER; EPITHERMAL REACTORS; FAST REACTORS; FBR TYPE REACTORS; FLUID FLOW; LIQUID METAL COOLED REACTORS; MATHEMATICAL MODELS; PHASE TRANSFORMATIONS; REACTORS; 220900* - Nuclear Reactor Technology- Reactor Safety; 210500 - Power Reactors, Breeding; 700410 - Specific Fusion Devices & Experiments- (1992-)

Citation Formats

Moriyama, Kiyofumi, Inoue, Akira, and Ohira, Hiroaki. The thermohydraulic characteristics of two-phase flow in extremely narrow channels (the frictional pressure drop and heat transfer boiling two-phase flow, analytical model). United States: N. p., 1993. Web.
Moriyama, Kiyofumi, Inoue, Akira, & Ohira, Hiroaki. The thermohydraulic characteristics of two-phase flow in extremely narrow channels (the frictional pressure drop and heat transfer boiling two-phase flow, analytical model). United States.
Moriyama, Kiyofumi, Inoue, Akira, and Ohira, Hiroaki. Wed . "The thermohydraulic characteristics of two-phase flow in extremely narrow channels (the frictional pressure drop and heat transfer boiling two-phase flow, analytical model)". United States.
@article{osti_6003522,
title = {The thermohydraulic characteristics of two-phase flow in extremely narrow channels (the frictional pressure drop and heat transfer boiling two-phase flow, analytical model)},
author = {Moriyama, Kiyofumi and Inoue, Akira and Ohira, Hiroaki},
abstractNote = {Two-phase flow in an extremely narrow channel appears in several engineering situations. One application is the duplicated heat-exchanger pipe which is suggested as a safety device for liquid metal cooling systems in fast breeder or fusion reactors. Steam bearings are also involved in the field. In this paper, pattern, pressure drop, and heat transfer were investigated for R113 boiling two-phase flow in extremely narrow channels with a thickness of 35-110 [mu]m between horizontal parallel plates. It was clarified from the experiments that the friction multiplier of two-phase flow is well estimated by an empirical correlation proposed for adiabatic systems, and that the heat-transfer coefficient of two-phase flow is 3-20 times as large as that of the liquid single-phase flow. An analytical model based on viscous flow and the effect of the capillary number on the thickness of the liquid film is proposed. It provides an explanation for the frictional pressure drop and the heat-transfer coefficient.},
doi = {},
journal = {Heat Transfer - Japanese Research; (United States)},
issn = {0096-0802},
number = ,
volume = 21:8,
place = {United States},
year = {1993},
month = {9}
}