Physical Mechanism of Ultrahigh Heat Flux removal by Nano-macro Hybrid Porous Material

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03928
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Yokohama National University
• Principal Investigator: Mori Shoji 横浜国立大学, 大学院工学研究院, 准教授 (10377088)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 限界熱流束向上 / 多孔質体 / 相変化 / 沸騰

Outline of Final Research Achievements

We proposed a technique to enhance the critical heat flux (CHF) action and (2) vapor escape channels from the top surface due to gravity. In this study, we especially focused on (2) the liquid supply through vapor escape channels from the top surface due to gravity. Based on the results, the following conclusions were obtained: In the high heat flux region, the liquid supplied by capillary action was shown to be the dominant factor leading to the CHF enhancement in saturated pool boiling, and the calculated CHF by the capillary limit model were found to be in good agreement with the CHF obtained from the experiments extracting only the effect of capillarity. Moreover, the new CHF model considering the two liquid supply mechanism as stated above was proposed to predict the CHF by honeycomb porous plate in a saturated pool boiling.

Free Research Field

熱流体工学