Review of particle deposition on aeroengine turbine blades and its mitigation

When aeroengines operate in harsh environments — such as deserts, dust storms, and marine regions— solid particles from the external environment are carried by the airflow into the turbine, where they are heated and deposit on the turbine blades. Additionally, solid particles produced during fuel combustion are also ingested into the turbine and accumulate on the blade surfaces. As these deposits build up over time on the blade surfaces, the turbine's performance progressively deteriorates, consequently compromising the engine's operational safety. In this review paper, we first examine the advantages and disadvantages of several typical deposition analysis models, including the critical velocity deposition model, critical viscosity deposition model, viscoelastic-plastic deposition model, and composite deposition model. Next, the effects of particle properties, inlet airflow conditions, blade characteristics, and cooling operation conditions on deposition patterns are summarized. Subsequently, the advantages and limitations of low-temperature, high-temperature, and actual deposition experiments are discussed, followed by analyzing the effects of particle deposition on turbine aerodynamic performance and cooling efficiency. Finally, the latest advancements in protective technologies, such as coatings and blade optimization, are explored. Based on the comprehensive review of the latest research progress, knowledge gaps are identified and potential future research directions are proposed. These findings provide practical references for the development of protection technologies and condition monitoring of turbine blades in aeroengines.