The corrugated plate dryer (CPD) is an important steam-water separation (SWS) equipment in the steam generator in the secondary loop of nuclear power plants (NPPs). Therefore, it is very important to understand the process and mechanism of liquid film rupture (LFR) on the wall surface of the CPD. In this paper, for the first time, the process of rupture of the liquid film (LF) on the surface of the corrugated plate is studied. The mechanism of LFR on the wall surface of a vertical corrugated plate was studied experimentally. A high-speed camera was used to collect the image of the broken liquid film, and an experimental research on the broken position, the broken process, and the broken shape of the liquid film was carried out. The results show that the rupture of the liquid film on the wall surface of the corrugated plate under the horizontal shear of airflow (HSA) mostly occurs at the upper middle position of the main flow of the liquid film. Also, the rupture position moves up with the increase in the Reynolds number of the liquid film. LFR needs to go through the process of stable flow, single strip-shaped liquid film (SSLF) detachment, two strip-shaped liquid film (TSSLF) formation, and finally chaotic disordered rupture. The angle between the two strip-shaped liquid films (ATSSLF) is positively related to the Reynolds number of the liquid film.

波纹板干燥机（CPD）是核电厂（NPP）二次回路中蒸汽发生器中的重要汽水分离（SWS）设备。因此，了解CPD壁表面液膜破裂（LFR）的过程和机理非常重要。本文首次研究了瓦楞纸板表面液膜（LF）的破裂过程。实验研究了垂直波纹板壁面上LFR的机理。使用高速照相机收集破裂的液膜的图像，并进行了液膜的破裂位置，破裂过程和破裂形状的实验研究。结果表明，在气流（HSA）的水平剪切作用下，波纹板壁表面上的液膜破裂主要发生在液膜主流的中上位置。而且，破裂位置随着液膜的雷诺数的增加而向上移动。LFR需要经历稳定的流动，单条状的液膜（SSLF）分离，两个条状的液膜（TSSLF）形成以及最后混乱的无序破裂的过程。两个带状液膜之间的角度（ATSSLF）与液膜的雷诺数成正相关。LFR需要经历稳定的流动，单条状的液膜（SSLF）分离，两个条状的液膜（TSSLF）形成以及最后混乱的无序破裂的过程。两个带状液膜之间的角度（ATSSLF）与液膜的雷诺数成正相关。LFR需要经历稳定的流动，单条状的液膜（SSLF）分离，两个条状的液膜（TSSLF）形成以及最后混乱的无序破裂的过程。两个带状液膜之间的角度（ATSSLF）与液膜的雷诺数成正相关。