Гідродинаміка сепараційних пристроїв технологічного обладнання АЕС

• Дата: 2014
• Автори: Tuz, V., Lebed, N., Lebed, I.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: State Scientific and Technical Center for Nuclear and Radiation Safety 2014
• Онлайн доступ: https://nuclear-journal.com/index.php/journal/article/view/429
• Назва журналу: Nuclear and Radiation Safety

In order to ensure the efficiency of separation devices, one should know about the interaction of liquids and gases as well as the range of operating parameters within which the liquid film flow is steady and there is no re-entrainment. The range of stable operating parameters for separation devices in conditions under which there is no flow abnormality associated with the entrainment of liquid droplets is increased by covering the contact surface with mesh screening material for the liquid to move into the mesh structure of the coating. In contrast to smooth surfaces where the film rupture condition is determined by the physical properties of the liquid and wettability of the surface and depends on the balance of forces acting on an elementary volume of the film for mesh-coated surface, the effects of the capillary cell in the grid need to be taken into consideration as well. The studies have shown that the interaction of gravitationally flowing liquid film with upward flowing gas, which corresponds to the beginning of drop ablation process, depends on the irrigation density, geometric characteristics of the channel and mesh surface. A map of modes for gas–liquid systems on the surfaces of separation devices with mesh screens has been obtained. It is shown that the area of constant film flow on channel walls with mesh coating is significantly expanded in comparison with the corresponding area of channels with smooth walls.