| Citation: | YUAN Weiwei, HUANG Yong, ZHANG Hongzhou, et al. Experiment on shape and thickness of liquid film formed by impinging jets on solid walls[J]. Journal of Aerospace Power, 2022, 37（11）：2524-2533 doi: 10.13224/j.cnki.jasp.20220232
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In order to investigate the main characteristics of the liquid film formed by impinging jets on solid walls, the shape and thickness of the liquid film were investigated experimentally based on ultraviolet light emitting diode induced fluorescence （LEDIF）and a high-speed camera. The experiment results showed that the length and width of the liquid films on the curved wall and flat wall increased as the jet velocity increased. As the airflow velocity increased, the lengths of the liquid films on both the flat and curved walls increased, while the widths decreased. The width of the liquid film increased slightly, but the length of the liquid film increased obviously as the radius of curvature increased. The thickness of the liquid film on the flat and curved walls decreased gradually as the jet velocity increased. The transition occurred when the jet velocity reached the critical value, and the thickness of the liquid film increased rapidly. The critical velocity of the liquid film on the curved wall was 19.10—25.08 m/s, while that of the liquid film on the flat wall was 25.08—35.92 m/s, approximately. As the airflow velocity increased, the thickness of the liquid film on the flat wall decreased gradually, while the thickness of the liquid film on the curved wall increased when
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