Experimental study was performed using water as working medium to investigate the flow instability in a vertical narrow annuli with both subcooled and saturated boilings.

以水为工质,过冷和饱和条件下对竖直窄环隙流道进行了自然对流沸流动不稳定性实验,观测到了窄隙流道饱和沸时所特有型流动不稳定性。

The critical heat flux (CHF) of subcooled boiling is theoretically predicted by using the microlayer model.

本文利用微液层模型对过冷沸临界热流密度（CHF）进行了理论预测。