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Главная Архив Thermal Letter Оргкомитет Будущие конференции AIHTC
International Heat Transfer Conference 11

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

RELATIVE THERMO-HYDRAULIC PERFORMANCE OF DUCTS OF SQUARE AND CIRCULAR CROSS SECTIONS WITH TWISTED TAPE INSERTS

S. Ray
Department of Mechanical Engineering Indian Institute of Technology Bombay 400 076 India

Anil W. Date
Department Mechanical Engineering, Indian Institute of Technology, Bombay

DOI: 10.1615/IHTC11.1890
pages 315-320

Аннотация

The relative thermo-hydraulic performance of square and circular ducts with twisted tape inserts is studied in this paper. The results show that the square tubes perform better than the circular ducts for fluids with higher Prandtl number, irrespective of the operating Reynolds number and twist ratio. Significantly better performance is observed even for air under certain conditions. The performance parameters generally show an optimal operating condition. The Reynolds number, corresponding to which the optima occurs, increases with the increase in twist ratio, but, decreases with the increase in Prandtl number.

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