Numerical Analysis of Spray Cooling Characteristics in Superheated Steam Pipelines

JIANG Can; CUI Longhao; XIA Tongling; LI Ao; SUN Zhongguo; XI Guang

doi:10.7652/xjtuxb202506013

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Numerical Analysis of Spray Cooling Characteristics in Superheated Steam Pipelines

更新时间：2025-08-26

- Numerical Analysis of Spray Cooling Characteristics in Superheated Steam Pipelines
- Journal of Xi’an Jiaotong University Vol. 59, Issue 6, Pages: 122-132(2025)
- 作者机构：
  
  1.西安交通大学未来技术学院， 710049，西安
  2.西安交通大学能源与动力工程学院， 710049，西安
  3.广东美的暖通设备有限公司， 528311，广东佛山
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202506013
  CLC： TK11
- Received：22 November 2024，
  
  Online First：06 March 2025，
  
  Published：10 June 2025
- 稿件说明：
移动端阅览
JIANG Can, CUI Longhao, XIA Tongling, et al. Numerical Analysis of Spray Cooling Characteristics in Superheated Steam Pipelines[J]. Journal of Xi’an Jiaotong University, 2025, 59(6): 122-132.
DOI：

JIANG Can, CUI Longhao, XIA Tongling, et al. Numerical Analysis of Spray Cooling Characteristics in Superheated Steam Pipelines[J]. Journal of Xi’an Jiaotong University, 2025, 59(6): 122-132. DOI： 10.7652/xjtuxb202506013.

摘要

针对蒸汽管道中喷雾冷却效果不佳及冷却后蒸汽温度分布不均匀问题，采用离散相模型对喷雾冷却过程进行数值模拟，研究了喷雾初始粒径、冷却水流量及喷嘴数对冷却过程的影响。首先，验证数值模型的有效性并设计正交实验；然后，通过极差分析探究不同参数对温度降低量、温度不均匀程度及液滴蒸发率的影响规律；最后，探讨液滴粒径不同导致的蒸发破碎现象差异对液滴蒸发率的影响。仿真结果表明：当粒径从50 μm增大到200 μm时，受到的曳力和撞击壁面引起的二次破碎影响逐渐增强，且随着液滴粒径的增大呈现先减小后增大趋势；冷却水雷诺数每增加439.04，管道出口平均温度降低约2 K；喷嘴数对出口温度分布的不均匀程度影响较大，当喷嘴数为2时，温度分布最不均匀，喷嘴数为4、冷却水雷诺数为4 443.2、粒径为50 μm时，冷却效果最优，温度分布最均匀。该研究可为明晰管道内喷雾冷却的影响因素及指导工程中减温器的选择提供理论基础和参考。

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 50 μm to 200 μm

the evaporation rate initially decreased and then increased with the increase in diameter

influenced by drag-induced and wall-impact secondary fragmentation. For every increase of 439.04 in the cooling water Reynolds number

the average temperature reduction increased by 2 K. 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 50 μm. This study provides a theoretical foundation for understanding spray cooling factors and selecting desuperheaters in engineering.

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references

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