過熱蒸汽管道噴霧冷卻特性數(shù)值分析

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關(guān)鍵詞：噴霧冷卻；正交實(shí)驗(yàn)；離散相模型

中圖分類號(hào)：TK11文獻(xiàn)標(biāo)志碼：A

DOI：10.7652/xjtuxb202506013 文章編號(hào)：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，F(xiàn)oshan，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

蒸汽減溫器是將過熱蒸汽溫度降低到飽和溫度或者接近飽和溫度的一種溫度調(diào)節(jié)設(shè)備。（剩余16297字）