Augmenting the Heat Transfer Performance of Rotating Two-Phase Thermosyphons
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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A Nusselt-type analysis was performed for laminar film condensation on the inside of a truncated rotating cone. Studies of this model revealed that the heat transfer capacity of the rotating thermosyphon was controlled by three thermal resistances the condensate film thickness, condenser wall resistance, and the extermal heat transfer coefficient. A parametric study of the solution was performed for various values of these resistances and methods for reducing them were investigated. A stainless steel thermosyphon was tested using various working fluids. A copper thermosyphon was constructed and tested using water. Different power levels and speeds of rotation were investigated. Longitudinal grooving was studied as a means of reducing the heat transfer resistance of the internal condenser surface. An analytical model was developed for a triangular groove profile and a parametric analysis performed to show effects on heat transfer capabilities.
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- Fluid Mechanics