CIESC Journal ›› 2019, Vol. 70 ›› Issue (12): 4590-4598.DOI: 10.11949/0438-1157.20190377
• Fluid dynamics and transport phenomena • Previous Articles Next Articles
Haiyan ZHANG1,2(),Jiangfeng GUO1,2(),Xiulan HUAI1,2,Xinying CUI1,2
Received:
2019-04-11
Revised:
2019-09-16
Online:
2019-12-05
Published:
2019-12-05
Contact:
Jiangfeng GUO
张海燕1,2(),郭江峰1,2(),淮秀兰1,2,崔欣莹1,2
通讯作者:
郭江峰
作者简介:
张海燕(1994—),女,博士研究生,基金资助:
CLC Number:
Haiyan ZHANG, Jiangfeng GUO, Xiulan HUAI, Xinying CUI. Investigations of axial conduction effect on local heat transfer performance in PCHE[J]. CIESC Journal, 2019, 70(12): 4590-4598.
张海燕, 郭江峰, 淮秀兰, 崔欣莹. PCHE内轴向导热对局部换热性能的影响研究[J]. 化工学报, 2019, 70(12): 4590-4598.
Case No. | D/mm | t f /D | t p /D | 入口温度/K | |
---|---|---|---|---|---|
热侧 | 冷侧 | ||||
1 | 0.8 | 0.5 | 0.5 | 390.15 | 295.15 |
2 | 1.2 | 0.5 | 0.5 | 390.15 | 295.15 |
3 | 1.6 | 0.5 | 0.5 | 390.15 | 295.15 |
4 | 1.6 | 0.5 | 0.5 | 415.15 | 290.15 |
5 | 1.6 | 0.5 | 0.5 | 440.15 | 285.15 |
6 | 1.6 | 0.5 | 1 | 390.15 | 295.15 |
7 | 1.6 | 1 | 0.5 | 390.15 | 295.15 |
Table 1 Detailed sizes and boundary conditions of different structures
Case No. | D/mm | t f /D | t p /D | 入口温度/K | |
---|---|---|---|---|---|
热侧 | 冷侧 | ||||
1 | 0.8 | 0.5 | 0.5 | 390.15 | 295.15 |
2 | 1.2 | 0.5 | 0.5 | 390.15 | 295.15 |
3 | 1.6 | 0.5 | 0.5 | 390.15 | 295.15 |
4 | 1.6 | 0.5 | 0.5 | 415.15 | 290.15 |
5 | 1.6 | 0.5 | 0.5 | 440.15 | 285.15 |
6 | 1.6 | 0.5 | 1 | 390.15 | 295.15 |
7 | 1.6 | 1 | 0.5 | 390.15 | 295.15 |
序号 | 网格数 | 壁面y + | 出口壁温值/K | 相对误差/% | |||
---|---|---|---|---|---|---|---|
热侧 | 冷侧 | 热侧 | 冷侧 | 热侧 | 冷侧 | ||
1 | 287292 | 2.43 | 2.26 | 296.47 | 365.13 | 0.064 | 0.637 |
2 | 516912 | 1.84 | 1.59 | 296.39 | 366.02 | 0.037 | 0.395 |
3 | 840516 | 1.06 | 0.83 | 296.31 | 367.18 | 0.010 | 0.079 |
4 | 1150720 | 0.71 | 0.51 | 296.28 | 367.47 | 0 | 0 |
Table 2 Grid independence test
序号 | 网格数 | 壁面y + | 出口壁温值/K | 相对误差/% | |||
---|---|---|---|---|---|---|---|
热侧 | 冷侧 | 热侧 | 冷侧 | 热侧 | 冷侧 | ||
1 | 287292 | 2.43 | 2.26 | 296.47 | 365.13 | 0.064 | 0.637 |
2 | 516912 | 1.84 | 1.59 | 296.39 | 366.02 | 0.037 | 0.395 |
3 | 840516 | 1.06 | 0.83 | 296.31 | 367.18 | 0.010 | 0.079 |
4 | 1150720 | 0.71 | 0.51 | 296.28 | 367.47 | 0 | 0 |
项目 | 温度变化值 /K | 压降值 /Pa | ||
---|---|---|---|---|
热侧 | 冷侧 | 热侧 | 冷侧 | |
实验结果 | 169.6 | 140.38 | 24180 | 73220 |
数值结果 | 170.58 | 137.286 | 26152.8 | 76000.5 |
相对误差/% | 0.58 | 2.20 | 8.16 | 3.80 |
Table 3 Comparison between numerical results and experimental results by Ishizuka[8]
项目 | 温度变化值 /K | 压降值 /Pa | ||
---|---|---|---|---|
热侧 | 冷侧 | 热侧 | 冷侧 | |
实验结果 | 169.6 | 140.38 | 24180 | 73220 |
数值结果 | 170.58 | 137.286 | 26152.8 | 76000.5 |
相对误差/% | 0.58 | 2.20 | 8.16 | 3.80 |
Fig.4 Relations of local convective heat transfer coefficient h(a), heat transfer entropy generation number Ns 1 ,T (b) and axial wall conduction number M c (c) with bulk temperature with different wall thicknesses
Fig.5 Local heat flux q(a), convective heat transfer coefficient h (b), heat transfer entropy generation number Ns 1 ,T (c) and axial wall conduction number M c (d) with different diameters
Fig.6 Local heat flux q(a), convective heat transfer coefficient h(b), heat transfer entropy generation number Ns 1 ,T (c) and axial wall conduction number M c (d) with different inlet temperature difference between two sides
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