Study on fracture morphology of water film on the wall of vertical corrugated plate under shear of the air flow

摘要

Corrugated plate is a main steam-water separation device, and the water film cracking mechanism has a great influence on the steam-water separation efficiency. Based on high-speed photography method, the rupture morphology of the water film is experimentally studied. Rupture morphology of the water film under the shearing of the air flow is numerically simulated according on the improved moving particle semi-implicit (MPS) method, and the initial distribution of the air flow velocity in the corrugated plate channel is obtained. The relationship between critical air flow velocity when the water film is broken and the water film width is given. Comparison between experimental results and numerical results shows that improved MPS method can simulate location of film rupture, the rupture pattern, the droplet splash direction, and flight speed of the droplet after rupture, respectively. There is a positive correlation between critical air flow velocity and water film width on the wall. (C) 2019 Elsevier Ltd. All rights reserved.