Abstract
This paper was aimed to investigate the nucleate boiling phenomena with the presence of the rotating blades above the heat transfer surface. The boiling process at 1 atm was carried out by allowing heat transferred from a copper surface to distilled water. The 4-blade rotor made from copper was vertically installed at different distances above the heat transfer surface (LSB). The flow visualization during phase-change phenomena under heat flux values of 160-610 kW/m2 was feasible by high-speed camera. The results showed that pool boiling at the heat flux of 160 kW/m2 corresponded to isolated bubble regime, and at the value of 610 kW/m2, the column regime was observed. In addition to the two-phase flow pattern, the heat transfer coefficient data was reported in this work. The heat transfer results were found to depend on the distance at which the rotor was installed.
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