A Parametric Study on the Performance of a Helical Type of Internally Finned Tube

[摘要] We study the performance of a helical type of internally finned tube (HIFT), using computational fluid dynamics (CFD) to obtain optimal temperature uniformity and reduce the pressure drop. In comparison with a bare tube, the HIFT improved the temperature uniformity with a helix length of 10 d, which was enough to obtain satisfactory temperature uniformity. A smaller helix interval angle and a smaller helix pitch yielded a larger pressure drop. The temperature of the HIFT decreased with an increase in the helix pitch.

[关键词] HIFT;temperature uniformity;pressure drop;helix length;helix interval angle;helix pitch