化工学报 ›› 2020, Vol. 71 ›› Issue (S2): 142-151.DOI: 10.11949/0438-1157.20200491
收稿日期:
2020-05-06
修回日期:
2020-05-12
出版日期:
2020-11-06
发布日期:
2020-11-06
通讯作者:
文哲希
作者简介:
吕义高(1996—),男,硕士研究生,基金资助:
Yigao LYU(),Qing LI,Zhexi WEN()
Received:
2020-05-06
Revised:
2020-05-12
Online:
2020-11-06
Published:
2020-11-06
Contact:
Zhexi WEN
摘要:
印刷电路板换热器换热性能好、紧凑性高,在超临界CO2布雷顿循环等领域有着广阔的应用前景。本文通过数值计算,首先比较了湍流条件下15°~30°范围内不同波纹角对正弦波纹流道流动换热性能的影响,结果表明,波纹流道内的换热效果随波纹角的增大而增强(换热量最大增长了7.1%),且热侧的压降相对于冷侧增大更明显。其次,分节研究并分析了流道内不同区域的局部流动换热特性,发现了在热侧和冷侧入口区域各存在着1个大、小温差区,同时,需要对入口处进行合理的优化设计以减小入口处的压降。最后,进一步设计了一种“正弦波纹+直通道”的复合结构并初步探究了该结构的流动换热性能。
中图分类号:
吕义高, 李庆, 文哲希. 正弦波纹流道印刷电路板换热器热工水力性能[J]. 化工学报, 2020, 71(S2): 142-151.
Yigao LYU, Qing LI, Zhexi WEN. Thermal-hydraulic performance of sinusoidal channel printed circuit heat exchanger[J]. CIESC Journal, 2020, 71(S2): 142-151.
参数 | 冷侧流体 | 热侧流体 | ||
---|---|---|---|---|
入口 | 出口 | 入口 | 出口 | |
Tin /K | 350 | — | 675 | — |
pout /MPa | — | 20 | — | 8 |
min /(kg?h) | 0.6、1.0、1.4、1.8 | — | 0.6、1.0、1.4、1.8 | — |
表1 边界条件
Table 1 Boundary conditions
参数 | 冷侧流体 | 热侧流体 | ||
---|---|---|---|---|
入口 | 出口 | 入口 | 出口 | |
Tin /K | 350 | — | 675 | — |
pout /MPa | — | 20 | — | 8 |
min /(kg?h) | 0.6、1.0、1.4、1.8 | — | 0.6、1.0、1.4、1.8 | — |
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