过热蒸汽管道喷雾冷却特性数值分析

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关键词：喷雾冷却；正交实验；离散相模型

中图分类号：TK11文献标志码：A

DOI：10.7652/xjtuxb202506013 文章编号：0253-987X（2025）06-0122-11

Numerical Analysis of Spray Cooling Characteristics in Superheated Steam Pipelines

JIANG Can1，CUI Longhao²， XIA Tongling³，LI Ao³， SUN Zhongguo 1，2 ， XI Guang² （1.School of Future Technology，Xi'an Jiaotong University，Xi'an 710049，China； 2. School of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 71oo49，China;

Media HVACand Building Technologies Division Research and Development Center，Foshan，Guangdong ，China）

Abstract：To address the issues of insufficient cooling effectiveness and uneven post-cooling temperature distribution in steam pipelines，the discrete phase model for numerical simulations is employed in this study to investigate the effects of initial droplet diameter，cooling water flow rate，and number of nozzles on the cooling process. First， the validity of the numerical model was verified，and an orthogonal experimental design was established. Then，the influence of different parameters on temperature reduction，uniformity，and droplet evaporation rate was analyzed through range analysis. Finally， the impact of varying droplet diameters on evaporation and fragmentation phenomena was explored. The numerical results showed that for droplet diameters ranging from 50μm to 200μm ， the evaporation rate initially decreased and then increased with the increase in diameter，influenced by drag-induced and wal-impact secondary fragmentation. For every increase of 439.04 in the cooling water Reynolds number，the average temperature reduction increased by 2K .The number of nozzles significantly affected temperature uniformity; with 2 nozzles，the distribution was most uneven. Optimal cooling performance was achieved with 4 nozzles，a cooling water Reynolds number of 4 443.2，and a droplet diameter of 50μm . This study provides a theoretical foundation for understanding spray cooling factors and selecting desuperheaters in engineering.

Keywords： water spray cooling；orthogonal experiments; discrete phase model

蒸汽减温器是将过热蒸汽温度降低到饱和温度或者接近饱和温度的一种温度调节设备。（剩余16297字）