Research in domain of droplet impingement erosion of the power equipment: lookback study and context analysis

Abstract

The main work objective is the creation of the scientific background for correct determination of a set of requirements to the fabrication material with a high-wearing feature under the droplet impingement erosion. A review of a backward and present state of the art of the national and foreign investigations in the field of the droplet impingement erosion of metal materials is carried out. The main outcome is as follows: insufficient fundamentality of research in this area; limitation of the used theoretical models; one-sided approach of many authors to the phenomenon that combines a whole set of factors of different physical nature. On this background, the author's concept of the erosive wear process of metal under the influence of two-phase mist flow is presented. Particular attention is paid to a new scientific hypothesis of the active hydrogen effect on the fracture of metal under the hypervelocity dropwise collisions.

Keywords

• каплеударная эрозия
• усталостное разрушение
• кавитация
• водородное изнашивание
• лопатки паровых турбин
• металлические сплавы
• антиэрозионная защита
• droplet impingement erosion
• fatigue failure
• cavitation
• hydrogen wear
• steam turbine blades
• metal alloys
• anti-erosive protection