Effect of surface wettability on boiling two-phase flow in a narrow channel

Research Project

Project/Area Number	15K18318
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Nuclear engineering
Research Institution	Kyoto University
Principal Investigator	Ito Daisuke 京都大学, 複合原子力科学研究所, 助教 (30630024)
Research Collaborator	Prasser Horst-Michael ETH Zurich, 教授
Project Period (FY)	2015-04-01 – 2018-03-31
Project Status	Completed (Fiscal Year 2017)
Budget Amount *help	¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000) Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000) Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords	沸騰二相流 / 狭隘流路 / 中性子ラジオグラフィ / 液膜センサ / 静電容量式液膜センサ / 液膜厚さ / ボイド率 / 静電容量
Outline of Final Research Achievements	To investigate the heat transfer and two-phase flow characteristics in a narrow rectangular channel, liquid film measurement system based on an electrical capacitance measurement was developed, and the measurement with sampling frequency of 10kHz which is similar to that of a conventional electrical conductance system could be conducted. In addition, neutron radiography system was also improved to enhance the temporal resolution. Finally, boiling heat transfer experiments with one-side heated narrow channel were performed and the possibility of the detailed measurement of two-phase flow structure in the narrow gap was shown.