摘要
以去离子水为工质,对当量直径分别为1.33mm和2mm的竖直矩形微槽道进行了EHD两相流饱和沸腾传热实验研究,运用分维数、关联维数和Kolmogorov熵对槽道进出口压差波动信号进行了动力学研究,分析了槽道尺寸和外加高压电场对传热系数和非线性特征量的影响规律,结果表明:有无电场情况下,各系统均具有非线性混沌特性,并且有外加高压电场系统的混沌程度比无外加高压电场系统的混沌程度更强烈,槽道尺寸越小,系统的混沌程度越强烈,混沌程度越强烈的系统对应的传热系数越大。
Two -phase flow saturated boiling heat transfer experimental research was conducted in vertical and rectangular micro channels with hydraulic diameters of 1.33mm and 2mm, using de - ionized as the working fluids, dynamic research of pressure fluctuation signals was carried out by means of fractal dimension, correlation dimension and Kolmogoroy entropy, effects for heat transfer coefficient and these quantitative numbers because of channel size and high voltage electric field were studied. The result indicated that the chaotic intensity of systems when high voltage electric field was exerted was stronger than that of sys- tems which had no high voltage electric field. If the size of the channel was smaller, the chaotic intensity of the system was stron- ger, the heat transfer coefficient increased with the increase of the chaotic intensity.
出处
《低温与超导》
CAS
北大核心
2013年第9期59-64,共6页
Cryogenics and Superconductivity
基金
国家自然科学基金资助项目(20676039)资助
关键词
竖直矩形微槽道
EHD强化传热
气液两相流
分维数
关联维数
Kolmogorov熵
Vertical and rectangular micro channel, EHD heat transfer enhancement, Gas liquid two - phase flow, Fractal dimension, Correlation dimension, Kolmogoroy entropy
