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摘要
Heat transfer enhancement techniques [active techniques (electric field, acoustic or surface vibration, etc.) and passive techniques (fluid additives or special surface geometries)] can improve performance of heat exchangers to perform a certain heat transfer duty. Curved tubes have been used as one of the passive heat transfer enhancement techniques and are most widely used tubes in several heat transfer applications. This paper reviews heat transfer through helical coil of circular cross sections in terms of different dimensionless numbers, their validity, and effect of geometry, friction factors, different coil curvature ratios, fluid types, laminar and turbulent flow on heat transfer rate.
- 出版日期2011-10
