Transient evaporation of moving water droplets in steam-hydrogen-air environment

被引：40
作者：
Shanthanu, Sarkar [1 ]
Raghuram, S. [1 ]
Raghavan, Vasudevan [1 ]
机构：
[1] Indian Inst Technol Madras, Dept Mech Engn, Madras 600036, Tamil Nadu, India
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2013年 / 64卷
关键词：
Nuclear reactor; Loss of coolant accident; Water spray; Droplet vaporization; Moving droplet; Hydrogen-steam-air environment; LAMINAR CONVECTIVE ENVIRONMENT; MARANGONI INSTABILITY;
D O I：
10.1016/j.ijheatmasstransfer.2013.04.066
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
During a severe loss of coolant accident in a nuclear reactor, steam and hydrogen are produced by the oxidation of reactor core and get distributed in the containment. A water spray system is employed to cool the mixture as well as to enhance the mixing of the gases to avoid hydrogen accumulation. This paper presents two-phase numerical simulations of transient vaporization of a moving spherical water droplet. The numerical model considers the variation of thermo-physical properties in both liquid- and vapor-phases, as functions of temperature and species concentrations. Multi-component diffusion and surface tension effects are also considered. The model has been validated using experimental results available in literature for hydrocarbon fuel droplet evaporation. Validated model is used to study the evaporation characteristics of moving water droplets under conditions typically observed in nuclear reactor during a loss of coolant accident. The effects of ambient temperature and hydrogen concentration on the vaporization characteristics are studied thoroughly. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：536 / 546
页数：11
相关论文
共 25 条
  • [1] Babic M., 2007, P INT C NUCL EN NEW, V13
  • [2] NUMERICAL-ANALYSIS OF CONVECTING, VAPORIZING FUEL DROPLET WITH VARIABLE PROPERTIES
    CHIANG, CH
    RAJU, MS
    SIRIGNANO, WA
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1992, 35 (05) : 1307 - 1324
  • [3] Comparison of multicomponent fuel droplet vaporization experiments in forced convection with the Sirignano model
    Daïf, A
    Bouaziz, M
    Chesneau, X
    Chérif, AA
    [J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE, 1998, 18 (04) : 282 - 290
  • [4] Marangoni and stability studies on fiber-supported methanol droplets evaporating in reduced gravity
    Dwyer, HA
    Shaw, BD
    [J]. COMBUSTION SCIENCE AND TECHNOLOGY, 2001, 162 (1-6) : 331 - +
  • [5] DWYER HA, 1996, P COMBUST INST, V26, P1613
  • [6] Fossaic A., 2010, EXPT VALIDATION APPL, P14
  • [7] VAPOR-LIQUID-EQUILIBRIA BY UNIFAC GROUP CONTRIBUTION - REVISION AND EXTENSION .2.
    GMEHLING, J
    RASMUSSEN, P
    FREDENSLUND, A
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1982, 21 (01): : 118 - 127
  • [8] Theoretical analysis of Marangoni instability of an evaporating droplet by energy method
    Ha, VM
    Lai, CL
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2004, 47 (17-18) : 3811 - 3823
  • [9] Onset of Marangoni instability of a two-component evaporating droplet
    Ha, VM
    Lai, CL
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2002, 45 (26) : 5143 - 5158
  • [10] A Detailed Examination of Gas and Liquid Phase Transient Processes in Convective Droplet Evaporation
    Haywood, R. J.
    Nafziger, R.
    Renksizbulut, M.
    [J]. JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1989, 111 (1-4): : 495 - 502
123