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Главная Архив Thermal Letter Оргкомитет Будущие конференции AIHTC
International Heat Transfer Conference 6

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

HEAT TRANSFER INSIDE A TUBE WITH A NOVEL PROMOTER

Saburo Maezawa
Seikei University, Tokyo, Japan

G. S. H. Lock
Department of Mechanical Engineering University of Alberta Edmonton, Alberta, Canada

DOI: 10.1615/IHTC6.1330
pages 595-600

Аннотация

The paper presents the results of an experimental study of heat transfer and friction inside a circular tube containing a number of different turbulence promoters, among which is a novel device developed from earlier work on thermosyphons. (1) Measurements of the local and average heat transfer rate and pressure drop were taken across the test section. The results show a maximum local Nusselt number at a point 1 to 2 diameters downstream of the device. This is in keeping with the results from conventional promoters. Further downstream, i.e. beyond 10 diameters, all promoters were found to produce only a small increase in heat transfer. The average heat transfer rate and the friction factor were noticeably higher in the presence of a promoter.

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