Abstract
Swirl flow analysis with CFD investigation was carried out to study the heat transfer characteristics of air flow inside a circular tube with a partially extending twisted tape inserts. Five combinations of tube with twisted-tape inserts, half-length upstream twisted tape condition (HLUTT), half-length downstream twisted tape condition (HLDTT), full-length twisted tape (FLTT), inlet twisted tape (ILTT) are considered along with plain tube (PT) for comparison. Three different twist parameter, λ = 0.14, 0.27, and 0.38, for twisted tape configuration have been studied for the above four configurations except PT. 3D numerical simulation was performed for an analysis of heat transfer and fluid flow for turbulent regime. The results of CFD investigations of flow characteristics are presented for the above four configurations along with a velocity, swirl intensity and temperature profiles analysis in comparison with the plain tube (PT) case.
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