Influence of Ribbed Cylinder Arrangement in Air Space on Intensity of Free Convection Heat Transfer

• Main Authors: К. B. Kuntysh, A. V. Samorodov, A. V. Pozdniakova
• Format: Article
• Language: Russian
• Published: Belarusian National Technical University 2004-04-01
• Series: Izvestiâ Vysših Učebnyh Zavedenij i Ènergetičeskih ob Edinennij SNG. Ènergetika
• Online Access: https://energy.bntu.by/jour/article/view/1122

The paper contains the results of experimental research and comparative analysis of mean convective heat transfer of a single pipe of 55.6 mm outside diameter with aluminium rolled-on ribs at 16.8 ribbing coefficient of horizontal, vertical and inclined arrangements. Data have been obtained for a single row of vertically and horizontally arranged pipes and also for singles rows of two-, three-, four-, five- and six-pipes which are horizontally arranged one over another with a 70 mm interval.Results of the investigations have been generalized in the form of similitude exponential equations embracing the interval of Relay number (35...400) • 103. Horizontal arrangement of a pipe results in the highest intensity of convactive heat transfer. When the number of pipes in a row is more than five convactive heat transfer reaches the least value and then this index is practically unchangeable. Decrease in convactive heat transfer intensity is equal to 1.42- and 1.21-fold in comparison with one- and two-pipe row.