Abstract
The process of ice growth that occurs in 180° curved pipes containing a water flow was investigated. Experiments were carried out under various experimental conditions in a set of pipes with an inside diameter of d = 16.5 mm - 21 mm, Reynolds numbers (based on pipe i.d.) Re = 290 - 6, 653, and temperature ratios of the freezing parameter. T* (=Tf - Tw)/(T∞ - Tf), Tf = 0°C, Tf = cooling pipe temperature, T∞ = temperature of flowing water ) = 1.52 - 11. From visual observations of ice formation and measurements of the pressure drop between the inlet and outlet of a curved pipe, it was understood that the flow condition and temperature ratio T* played an important role in the formation of ice in the curved pipe. The transient behaviors of ice formation with time lapse, were expressed in a relationship between nondimensional friction resistance f and Reynolds number for various temperature ratios T*. Moreover, the critical condition of perfect ice blockage in the curved pipe was obtained from experimental correlation equations in terms of T* and Re.
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