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  • 中国标准连:ISSN1005-2895
  • 续出版物号: CN 33-1180/TH
  • 主管单位:轻工业杭州机电设计研究院
  • 主办单位:轻工业杭州机电设计研究院、中国轻工机械协会、中国轻工业机械总公司
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  • 主  编:黄丽珍
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丁鑫, 陈晔, 贾可俊.基于VOF模型的水平管蒸发器液膜流动数值研究[J].轻工机械,2018,36(5):40-44
基于VOF模型的水平管蒸发器液膜流动数值研究
Numerical Analysis of Liquid Film Flow of Horizontal Tube Evaporator Based on VOF Model
  
DOI:10.3969/j.issn.1005 2895.2018.05.008
中文关键词:  水平管蒸发器  液体分布器  液膜宽度  VOF模型
英文关键词:horizontal tube evaporator  liquid distributor  liquid film width  VOF(volume of fluid) model
基金项目:
作者单位
丁鑫, 陈晔, 贾可俊 南京工业大学 机械与动力工程学院 江苏 南京211816 
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中文摘要:
      在水平管降膜蒸发器液体分布器的设计中,布液管结构参数影响着液体的成膜质量,为了简化设计计算,提出了利用有限元数值计算 软件研究开孔间距与其他结构参数的关系。开孔间距的大小与液膜在蒸发管外壁面形成的宽度有关。而影响蒸发管外壁面液膜宽度的主要因素有2个:布液孔孔 径和布液孔穿孔流速。因此,课题组采用VOF模型,模拟蒸发管外壁面液膜流动形态,探讨不同孔径和穿孔流速下的液膜宽度值,利用中心复合实验得出液膜宽 度Lm(开孔间距l)关于穿孔流速v和孔径d的关系式。结果表明:通过得到的关系式可以建立3者之间的内在关系,计算出不同孔径和穿 孔流速下的开孔间距值。该关系式能够简化液体分布器布液管各结构参数的设计和计算,具有一定的参考和应用价值。
英文摘要:
      In the design of the liquid distributor of the horizontal tube falling film evaporator, film forming quality is influenced by several structural parameters of the liquid distribution tube. The relationship between opening spacing and other structural parameters was studied by using the finite element numerical calculation software to simplify the design calculation. The distributor orifice spacing is related to the width of the liquid film formed on the outer wall of the evaporation tube. There are two main factors affecting the width of the liquid film on the outer surface of the evaporation tube: distributor orifice diameter and perforation velocity. Therefore, VOF model was used to simulate the flow pattern of liquid film on the outer wall of the evaporator tube. The width of the liquid film was calculated under different distributor orifice diameters and perforation velocities. The regression equation of the liquid film width Lm(distributor orifice spacing l), which described by distributor orifice diameters d and perforation velocities v was obtained by means of central composite experiment. The results show that the relationship between the three can be established by the obtained formula and the distributor orifice spacing of different distributor orifice diameters and perforation velocities can be calculated. This formula can simplify the design and calculation of various structural parameters of the liquid distributor, and has certain reference and application value.
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