等离子体激励对高温燃气涡轮叶顶间隙泄漏流抑制效果研究

This paper focuses on the leakage flow between high-pressure turbine rotor blades as the research subject. Based on the establishment of computational methods for gas properties in the turbine environment and the calculation of maximum charge density parameters of plasma under variable actuation conditions, numerical simulation analysis is adopted to investigate the impact mechanism of plasma actuation on leakage flow at turbine blade tip clearances under high-temperature gas flow conditions. It explores the effects of different external actuation conditions and the arrangement of the actuation devices, including shroud single-stage actuator and their array configurations, on the suppression of leakage flow. The research indicates that increasing actuation intensity can enhance the suppression effect of actuator on leakage flow. When external actuation is increased from 0 to 200 for a single-stage actuator, the relative leakage reduction is 24.78%. The synergistic effect of multi-stage actuators can further improve the suppression effect. However, the array arrangement of multiple actuators may lead to inter-stage potential interference, altering potential and electric field distributions, generating factors that promote leakage flow, thereby resulting in a relatively smaller improvement in suppression effect compared to single-stage actuator.