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Numerical analysis of heat transfer and fluid flow in a three-dimensional wavy-fin and tube heat exchanger

✍ Scribed by Jiin-Yuh Jang; Li-Kwen Chen

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
812 KB
Volume
40
Category
Article
ISSN
0017-9310

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✦ Synopsis

The effects of different geometrical parameters, including tube row numbers (14 rows), wavy angles (0 = 8.95", 17.05", 32.21") and wavy heights (S = 0.751, 1.500 and 3.003 mm) are investigated in detail for the Reynolds number ReH (based on the fin spacing and the frontal velocity) ranging from 400 to 1200. Numerical results indicate that the row effect is less important in a wavy-fin as compared to plainfin counterpart. It is also found that, for equal wavy height, both the average Nusselt number and pressure coefficient are increased as the wavy angle is increased ; while for equal wavy angle, they are decreased as the wavy height is increased. The combination of (0 = 8.95", S = 1.500 mm) gives the highest flow area goodness factor (j/f). A comparison of the numerical results with the available experimental data is also presented.

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