含不凝气体水蒸气竖直管内冷凝传质传热研究

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黄雅楠,任婧杰,宋利滨,李涌泉,毕明树.含不凝气体水蒸气竖直管内冷凝传质传热研究[J].,2023,63(1):16-24

含不凝气体水蒸气竖直管内冷凝传质传热研究

Study of condensation mass and heat transfer by water vapor containing non-condensable gas in vertical tube

DOI：10.7511/dllgxb202301003

中文关键词:竖直管不凝气体冷凝传质传热冷凝液膜

英文关键词:vertical tube non-condensable gas condensation mass and heat transfer condensate film

基金项目:国家自然科学基金资助项目(52130410).

作者	单位
黄雅楠,任婧杰,宋利滨,李涌泉,毕明树

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中文摘要:

针对竖直管内含不凝气体水蒸气冷凝传质传热过程开展研究．基于ANSYS Fluent软件平台建立了多相多组分三维数值计算模型，通过将管内中心轴线和壁面上多点温度分布与Kuhn试验结果进行对比，验证了模型的可靠性．在此基础上，考察了混合气体进口温度、速度、压力以及不凝气体体积分数对管内冷凝传热过程的影响规律，并基于不凝气体体积分数修正，提出了竖直管内含不凝气体水蒸气冷凝传热关联式，关联式误差范围为-20%～18%；同时，探究了不凝气体对水蒸气冷凝传质过程的影响规律，发现冷凝水率和平均传质速率随不凝气体体积分数的增大呈现先增大后减小的趋势，少量不凝气体具有促进水蒸气冷凝的作用，不凝气体体积分数为23.2%左右时，冷凝水率和平均传质速率最高．研究结果可为含不凝气体水蒸气的传热关联式和传质模拟研究提供参考．

英文摘要:

The condensation mass and heat transfer process of water vapor containing non-condensable gas in vertical tube is studied. Based on ANSYS Fluent software platform, a multi-phase multi-component three-dimensional numerical calculation model is established. The reliability of the model is verified by comparing the temperature distribution of multiple points on the central axis and wall surface of the tube with Kuhn test results. On this basis, the effects of inlet temperature, velocity, pressure and volume fraction of non-condensable gas on the process of condensing heat transfer in a vertical tube are investigated. Based on the correction of volume fraction of non-condensable gas, a correlation formula for heat transfer of water vapor condensation with non-condensable gas in a vertical tube is proposed, and the error range is -20%-18%. At the same time, by exploring the influence law of the non-condensable gas volume fraction on the mass transfer process of water vapor condensation, it is found that the condensed water rate and the average mass transfer rate show a trend of decrease after the first increase with the increase of the non-condensable gas volume fraction, and a small amount of non-condensable gas has the role to promote water vapor condensation. When the non-condensable gas volume fraction is approximately 23.2%, the condensed water rate and the average mass transfer rate are the highest. The study results can provide reference for the study of heat transfer correlation and mass transfer simulation of water vapor containing non-condensable gas.

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含不凝气体水蒸气竖直管内冷凝传质传热研究

本站小编 Free考研考试/2024-01-16

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