Steady state and transient critical heat flux of flow boiling

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05828
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Kobe University
• Principal Investigator: Fukuda Katsuya 神戸大学, 海事科学研究科, 教授 (10127417)
• Co-Investigator(Kenkyū-buntansha): 劉 秋生 神戸大学, 海事科学研究科, 教授 (80294263) ; 柴原 誠 神戸大学, 海事科学研究科, 特命助教 (70628859)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 定常限界熱流束 / 過渡限界熱流束 / 円管内流動沸騰 / 流動沸騰開始条件

Outline of Final Research Achievements

The heat generation　rate was controlled with exponential functions. A correlation of the flow boiling CHF was obtained based on the experimental data. Various boiling incipiencies for subcooled water flowing in a uniformly heated narrow tube were measured experimentally. The boiling signal was analyzed using such as the wavelet decomposition method. The surface superheat ascended with an increase of the heat flux until the incipient boiling point was reached. The initial temperature overshoot did not appear as the outlet pressure increased. Since the existing correlations underestimated the incipient heat flux, a semi-empirical correlation of the boiling incipience was obtained based on the experimental data.

Free Research Field

原子力工学