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.

以质,分别在过冷和饱和条件下对竖直环道行了自然对沸腾动不稳定性实验,观测到了道饱和沸腾时所特有的蒸干型动不稳定性。