Abstract
A hydraulic analysis for turbulent flow of subcooled liquid nitrogen through an annulus within the HTS cable is numerically investigated in terms of friction factor and flow pattern. The control volume for the investigation is confined to the annular space between outer smooth surface of cable core and inner surface of corrugated cryopipe. The corrugation geometries i.e pitch and depth affect the friction factor and thus the pressure drop and pumping power of liquid nitrogen. Nine different geometries of corrugated cryostats with various combinations of pitches (6, 10 and 14 mm) and depths (5, 7 and 9 mm) are considered and compared with smooth (non-corrugated) pipe. The results are useful in selecting the cryostat configuration and the associated fluid pumping system for cooling HTS power cables.
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