关键词: 燃气轮机;涡轮叶片;颗粒沉积;沉积模型;气-固两相流

Abstract: In order to investigate the particle deposition distribution in the high-pressure turbine cascade channel of a typical marine gas turbine， for the dynamics of the particles entering the turbine cascade channel with the gas and the characteristics of the interaction between the particles and the wall surface， the interaction effect rules of adhesion and peeling， deposition and rebound after the particles impacting the turbine blade surface were analyzed， and the similarities and differences of the critical velocity model and the critical viscosity model for the simulation of particle deposition distribution were compared by using numerical simulation method. The results show that， under the calculation condition of this paper， for the critical velocity model， the particle deposition efficiency in the cascade channel changes abruptly in the range of particle momentum Stokes number of about 0.1 to 10. For the critical viscosity model， the particle deposition efficiency reaches 100% after the momentum Stokes number is greater than 10. For large particle size， whether the particle deposits or not， the former depends on the particle size， the latter depends on the mainstream temperature.

Key words: Gas turbine;Turbine vane;Particle deposition;Depositional model;Gas-solid two phase flow