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Basic Study on Advanced Heat Transfer Equipment by Applying Boiling Heat Transfer Enhancement Surface with Porous Structure

应用多孔结构沸腾传热强化表面的先进传热设备基础研究

基本信息

批准号：
21560216
负责人：
ASANO Hitoshi
金额：
$ 3.08万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

项目摘要

Forced convective boiling heat transfer characteristics in narrow rectangular channels, such as saturated boiling heat transfer coefficient, wall superheat at the boiling inception on start-up, and critical heat flux in subcooled boiling flows, were experimentally examined. In the saturated boiling experiments, it had been clarified that boiling behaviors were dominated by nucleate boiling for vapor quality up to 0. 6, and high heat transfer enhancement factor up to 11 could be obtained. However, for high quality condition, deterioration in heat transfer coefficient was observed for the coating, because the boiling mode was changed from nucleate boiling to liquid film vaporization. The wall superheat overshoot in a rapid heating assumed for the start-up, could be reduced 15 K by the coating. For subcooled boiling with the inlet subcooling of 40 K, the coating produced higher CHF than the smooth surface, because vapor bubbles on the coating were smaller than those on the smooth surface.

实验研究了矩形窄缝通道内的饱和沸腾换热系数、沸腾起始时刻的壁面粗糙度和过冷沸腾临界热流密度等特性。在饱和沸腾实验中发现，当蒸汽干度小于0。6，强化传热系数可达11。然而，对于高品质的条件下，观察到的传热系数恶化的涂层，因为沸腾模式从核沸腾变成液膜蒸发。在快速加热的启动假设的壁面温度超调，可以减少15 K的涂层。对于入口过冷度为40 K的过冷沸腾，涂层表面的汽泡比光滑表面的汽泡小，因此涂层表面的CHF比光滑表面的高。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

溶射皮膜による伝熱促進面を有する水平狭隘流路サブクール沸騰熱伝達特性に関する研究

热喷涂传热面水平窄流道过冷沸腾传热特性研究

DOI：
发表时间：
2011
期刊：
影响因子：
0
作者：
川崎敬;浅野等;冨田亮平;竹中信幸
通讯作者：
竹中信幸

Heat Transfer Enhancement in Evaporation by Thermal Spray Coating

热喷涂增强蒸发传热

DOI：
发表时间：
2010
期刊：
Proc. of Int. Symp. on Next-generation Air Conditioning and Refrigeration Technology
影响因子：
0
作者：
Hitoshi Asano;Ryohei Tomita;Ryota Shigehara;Nobuyuki Takenaka
通讯作者：
Nobuyuki Takenaka

溶射皮膜による急加熱時壁面過熱度の低減

通过热喷涂降低快速加热过程中壁面的过热度