化工学报 ›› 2019, Vol. 70 ›› Issue (S2): 201-207.DOI: 10.11949/0438-1157.20190492
收稿日期:
2019-05-09
修回日期:
2019-05-15
出版日期:
2019-09-06
发布日期:
2019-09-06
通讯作者:
田茂诚
作者简介:
贾文华(1993—),女,硕士研究生,基金资助:
Wenhua JIA(),Maocheng TIAN(),Guanmin ZHANG,Min WEI
Received:
2019-05-09
Revised:
2019-05-15
Online:
2019-09-06
Published:
2019-09-06
Contact:
Maocheng TIAN
摘要:
通过数值模拟,研究了波节结构、空气含量及Reynolds数Re对含空气的水蒸气波节管内凝结特性的影响,并与圆形换热管内的情况进行了对比。模拟结果表明:空气含量增加,波节管壁面平均传热系数减小;波节管内流体流动和换热过程均呈现振荡波动;波节高度增加,壁面平均传热系数先增加后降低,在波节高度0.032 m达到峰值,而摩擦系数一直增加;波节间距减小,波节宽度增加,壁面平均传热系数及摩擦系数均增大;波节高度对波节管内流动和换热影响均大于波节宽度和波节间距。
中图分类号:
贾文华, 田茂诚, 张冠敏, 魏民. 含不凝气体蒸汽波节管内凝结特性研究[J]. 化工学报, 2019, 70(S2): 201-207.
Wenhua JIA, Maocheng TIAN, Guanmin ZHANG, Min WEI. Study on condensation characteristics of vapor with non-condensable gas in corrugated tubes[J]. CIESC Journal, 2019, 70(S2): 201-207.
管号 | 换热管 内径/m | 波节高度/m | 换热管 长度/m | 波节间距s1/m | 波节宽度s2/m |
---|---|---|---|---|---|
1# | 0.025 | 0 | 0.275 | — | — |
2# | 0.025 | 0.003 | 0.275 | 0.005 | 0.015 |
3# | 0.025 | 0.05 | 0.275 | 0.005 | 0.015 |
4# | 0.025 | 0.007 | 0.275 | 0.005 | 0.015 |
5# | 0.025 | 0.009 | 0.275 | 0.005 | 0.015 |
6# | 0.025 | 0.009 | 0.257 | 0.003 | 0.015 |
7# | 0.025 | 0.009 | 0.293 | 0.007 | 0.015 |
8# | 0.025 | 0.009 | 0.255 | 0.005 | 0.013 |
9# | 0.025 | 0.009 | 0.295 | 0.005 | 0.017 |
表1 模型具体尺寸
Table 1 Model size
管号 | 换热管 内径/m | 波节高度/m | 换热管 长度/m | 波节间距s1/m | 波节宽度s2/m |
---|---|---|---|---|---|
1# | 0.025 | 0 | 0.275 | — | — |
2# | 0.025 | 0.003 | 0.275 | 0.005 | 0.015 |
3# | 0.025 | 0.05 | 0.275 | 0.005 | 0.015 |
4# | 0.025 | 0.007 | 0.275 | 0.005 | 0.015 |
5# | 0.025 | 0.009 | 0.275 | 0.005 | 0.015 |
6# | 0.025 | 0.009 | 0.257 | 0.003 | 0.015 |
7# | 0.025 | 0.009 | 0.293 | 0.007 | 0.015 |
8# | 0.025 | 0.009 | 0.255 | 0.005 | 0.013 |
9# | 0.025 | 0.009 | 0.295 | 0.005 | 0.017 |
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