常压下窄缝池沸腾实验

Experiment of Boiling in Rectangular Narrow Space in Open Pool

介绍对竖直矩形窄通道进行的池沸腾实验研究。对四种不同的通道尺寸，分单面加热和双面加热共进行了8组实验工况。通过可视化观测和测量数据处理，得到如下结论：在窄缝中，汽泡生长受到空间尺寸限制，沸腾区压力有别于一般情况下的沸腾；矩形窄缝对沸腾有强化作用；双面加热情况下，过热度明显减小。

An experiment on boiling in rectangular narrow space is presented. Under different narrow space sizes and heat conditions, the experiment is recorded with camera and data acqurist system. Based on experiment results, some conclusions are drew: In narrow space, bubble sizes are constrained by the narrow space and pressure inside bubble block contributes a lot to tubble movement; narrow space dose enhance boiling heat transfer; the superheat is smaller under heated symmetrically than that under heated asymmetrically.