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首页> 外文期刊>International Journal of Heat and Mass Transfer >A physically based, one-dimensional three-fluid model for direct contact condensation of steam jets in flowing water
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A physically based, one-dimensional three-fluid model for direct contact condensation of steam jets in flowing water

机译：基于物理的一维三流体模型，用于蒸汽在流动水中的直接接触冷凝

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摘要

A simulation model for the direct contact condensation of steam jets in flowing water is presented. In contrast to previous empirical approaches, the model takes into account the underlying physical phenomena governing the condensation process. Condensation at the interface between the steam jet and the surrounding water is calculated according to the surface renewal theory. Entrainment of water into the steam jet is modeled based on the Kelvin-Helmholtz and Rayleigh-Taylor instability theories. The resulting steam-water two-phase flow is simulated based on a one-dimensional three-fluid model. An interfacial area transport equation is used to track changes of the interfacial area density due to droplet entrainment and steam condensation on droplets. The simulation results are in good qualitative agreement with published experimental data. In particular, the dependency of the steam jet length on the flow Reynolds number is properly reproduced. This corroborates our theory that the heat transfer coefficient at the interface of a condensing steam jet can be linked to the water flow rate via the interfacial friction factor.
机译：提出了水流中蒸汽射流直接接触冷凝的模拟模型。与以前的经验方法相反，该模型考虑了控制冷凝过程的潜在物理现象。根据表面更新理论计算蒸汽射流与周围水之间的界面处的冷凝水。基于开尔文-海姆霍兹（Kelvin-Helmholtz）和瑞利-泰勒（Rayleigh-Taylor）不稳定性理论对水进入蒸汽喷射流进行建模。基于一维三流体模型模拟所得的汽水两相流。界面面积传输方程用于跟踪由于水滴夹带和水滴上的蒸汽凝结而导致的界面面积密度的变化。仿真结果与已发表的实验数据在质量上吻合良好。特别地，正确地再现了蒸汽射流长度对流雷诺数的依赖性。这证实了我们的理论，即冷凝蒸汽射流界面处的传热系数可以通过界面摩擦系数与水的流速联系起来。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2017年第3期|1041-1050|共10页
  • 作者

    David Heinze; Thomas Schulenberg; Lars Behnke;

  • 作者单位

    Mechanical Engineering, Kernkraftwerk Gundremmingen GmbH, Dr.-August-Weckesser-Str. 1, 89355 Gundremmingen, Germany,Institute for Nuclear and Energy Technologies, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;

    Institute for Nuclear and Energy Technologies, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;

    Mechanical Engineering, Kernkraftwerk Gundremmingen GmbH, Dr.-August-Weckesser-Str. 1, 89355 Gundremmingen, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Direct contact condensation; Steam jet; Pipe flow; Surface renewal theory; Interfacial transfer;

    机译：直接接触凝结;蒸汽喷射管道流量表面更新理论;界面转移;

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