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,分别在过冷和饱和条件下环隙道行了自然腾动不稳定性实验,观测到了隙道饱和腾时所特有的蒸干型动不稳定性。