Study to clarify mechanism behind heat transfer enhancement in reactor due to RISA

研究阐明RISA增强反应器传热背后的机制

• 批准号: 23360425
• 负责人: HAZUKU Tatsuya
• 金额: $ 11.65万
• 依托单位: Tokyo University of Marine Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23360425/
• 关键词: 放射線誘起表面活性; 濡れ性; 沸騰伝熱; 伝熱向上; 軽水炉; ドライアウト

The final goal of this study is to clarify the mechanism behind enhancements of wall surface wettability and boiling heat transfer due to the radiation induced surface activation (RISA) under high-temperature and high-pressure conditions equivalent to thermal environment in a core of light water reactor. Detailed discussions about dynamic wettability at ambient temperatures up to 250 degrees centigrade were made based on the experimental data. The results showed that the advancing contact angles were decreased due to gamma-ray irradiation at all conditions tested and revealed that the dynamic wettability was enhanced due to the RISA even under high-temperature and high-pressure conditions.In order to evaluate the effect of surface wettability on liquid film dryout in annular-mist flow, the flow characteristics of liquid film and droplets near the condition in which the liquid film dryout occurs were also observed in detail using two-test pipes with different surface wettability.

本研究的最终目的是阐明在相当于轻水反应堆堆芯热环境的高温高压条件下，辐射诱导表面活化(RISA)增强壁面润湿性和沸腾换热的机理。在实验数据的基础上，对室温至250℃下的动态润湿性进行了详细的讨论。结果表明，在所有实验条件下，伽马射线辐照均使推进接触角减小，动态润湿性增强，即使在高温高压条件下也是如此。为了评价表面润湿性对环状雾流中液膜干涸的影响，还利用两种不同表面润湿性的试管，详细观察了液膜干涸附近液膜和液滴的流动特性。

项目成果

Effect of Wall Wettability on Flow Characteristics of Annular Two-phase Flow

壁面润湿性对环形两相流流动特性的影响

• DOI: 10.1615/multscientechn.v24.i3.30
• 发表时间: 2013
• 期刊: Multiphase Science and Technology
• 作者: Tatsuya HAZUKU;Akihiko KAMURA;Tomoji TAKAMASA
• 通讯作者: Tomoji TAKAMASA

環状噴霧流の液滴飛散と液膜ドライアウトに及ぼす壁面濡れ性の影響

壁面润湿性对环形喷雾流液滴散射和液膜干燥的影响

• 发表时间: 2011
• 作者: Tatsuya Suzuki,;Yu Tachibana;Tomoo Yamamura;Masanobu Nogami;Shin-ichi Koyama;下村祐介
• 通讯作者: 下村祐介