摘要
通过高速摄像可视化研究发现,在p=1.3～2MPa时,F-12质初始汽泡在壁面以小于0.1m/s的低速滑动中生长。热流密度和断面平均过冷度等参数对初始汽泡影响较大,热流密度越高,沸腾越早发生;小汽泡(d=0.01～0.07mm)运动速度在0.1～0.2 m/s左右,而较大(d=0.1～0.3 mm)汽泡的运动速度在0.25～0.7m/s左右。较大汽泡聚合小汽泡的过程是汽泡从小汽泡生长为大汽泡乃至于汽层的主要形式。
Through high-speed video, revealed that initial bubbles slipped and grew on wall with low velocity less than 0.1 m/s. Operating condition such as heat flux and subcooled temperature of cross-section greatly influenced the behavior of bubbles, with higher heat flux, resulted more advanced ONB point. The velocity of small bubbles (d = 0.01 ～ 0.07 mm) was between 0.1 to 0.2 m/s, and relative big bubbles (d = 0.1 ～ 0.3 mm) was between 0.25 to 0.7 m/s. The process of big bubbles coalesced small ones is the main pattern of bubbles grow to big bubbles and even to vapor layer.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2003年第4期661-663,共3页
Journal of Engineering Thermophysics
基金
国家重点基础研究专项资助项目(No.G2000026305)
空泡物理和自然循环重点实验室开放基金
关键词
过冷沸腾
汽泡行为
窄缝流道
subcooled boiling
bubble behavior
narrow channel
