Boiling heat transfer characteristics of pulsating flow in rectangular channel under rolling motion

• Published in: Experimental thermal and fluid science 2016-01, Vol.70, p.246-254
• Main Authors: Chen, Chong, Gao, Pu-zhen, Tan, Si-chao, Yu, Zhi-ting
• Format: Article
• Language: English
• Subjects: Amplitudes; Boiling; Boiling flow; Channels; Correlation; Fluctuation; Heat transfer; Heat transfer coefficient; Heat transfer coefficients; Pulsating flow; Rectangular channel; Rolling motion
• ISSN: 0894-1777; 1879-2286
• DOI: 10.1016/j.expthermflusci.2015.09.013

•Boiling heat transfer fluctuations have the same period with the rolling motion.•Fluctuation intensity of heat transfer increases with increasing rolling amplitude.•Fluctuation intensity of heat transfer increases with increasing rolling period.•Time average heat transfer of pulsating flow is equal to that in steady state. Boiling heat transfer technology is widely used in the barge-mounted nuclear power plant and received increasing attention recently, because that the boiling flow behaviors under ship motion conditions are very complicated and important. In order to study the boiling heat transfer characteristics of pulsating flow in a rectangular channel under rolling motion, a series of experiments were performed. The results demonstrate that the boiling heat transfer coefficient fluctuations have the same period with the rolling motion. The fluctuation intensity of the coefficient increases with the increase of rolling amplitude and period. The time average boiling heat transfer coefficient of pulsating flow under rolling motion condition is equal to that in the steady state. Based on this phenomenon a new correlation for predicting the time average boiling heat transfer coefficient of rectangular channel under rolling motion and steady state was proposed, with a MAE of 15.1%, as well as 95.4% and 81.3% of the data points within ±30% and ±20% error bands, respectively. Furthermore, the predicted correlations that used to calculate the relative pulsation amplitude and instantaneous boiling heat transfer coefficients of pulsating flow were developed based on the heat transfer characteristics of pulsating flow under rolling motion conditions.