| Autor: |
Ahmed, Ahmed H., Zaidan, Maki H., Al‐Jethelah, Manar S. M. |
| Předmět: |
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| Zdroj: |
Heat Transfer; Jan2025, Vol. 54 Issue 1, p330-350, 21p |
| Abstrakt: |
The wide usage of heat exchangers in various industrial applications has attracted the attention of many researchers. An experimental and theoretical study was conducted to investigate the fluid flow across a longitudinal fin flat tube heat exchanger with laminar forced convection. The studied parameters were the dimensionless longitudinal pitch length (4≤SL^≤5) $4\le \hat{{S}_{L}}\le 5)$, dimensionless transfer pitch (3 ≤ ST^ $\hat{{S}_{T}}$≤ 5), dimensionless downstream fin length (0.4≤Ld^≤1.0 $0.4\le \hat{{L}_{d}}\le 1.0$), dimensionless upstream fin length (0.4≤Lu^≤1 $0.4\le \hat{{L}_{u}}\le 1$), dimensionless downstream fin angle (0.26≤θ^≤0.78 $0.26\le \hat{\theta }\le 0.78$), and Reynolds number (223 ≤ Re ≤ 1114). The studied air thermophysical properties were assumed constant. The study was conducted under constant surface temperature. The dimensionless pressure drop was reduced by 60.8% (at Re = 223 as ST^ $\hat{{S}_{T}}$ increased from 3 to 5), 4.69% (at Re = 1114 as SL^ $\hat{{S}_{L}}$ decreased from 5 to 4), 225% (at Re = 223 as Ld^ $\hat{{L}_{d}}$ decreased from 1 to 0.4), 6.9% (at Re = 1114 as Lu^ $\hat{{L}_{u}}$ decreased from 1 to 0.4), and 349.9% (at Re = 668 as θ^ $\hat{\theta }$ decreased from 0.79 to 0.26). The difference between the experimental and numerical data was insignificant. Two correlations were developed based on the present experimental and numerical results. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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