空气涡轮起动机超高转速涡轮包容结构性能分析与研究

Performance Analysis and Research on the Containment Structure of Ultra-High Speed Turbine in Air Turbine Starter

针对某型航空发动机超高转速空气涡轮起动机的包容结构开展包容能力分析和验证,选用Johnson-Cook本构模型架构,采用LS-DYNA软件对其包容性进行数值仿真,并首次在超高速旋转试验台上开展针对转速118000r/min的涡轮盘包容性试验。试验结果显示,涡轮盘破碎飞出后,主要特征为对导向器壳体、包容环内壁的撞击以及沿包容环内壁的周向滑移刮擦运动,包容环通过自身变形与内壁与涡轮的刮擦滑移吸收能量。试验与模型仿真结果表明,该包容结构可以对破碎涡轮盘起到很好的约束作用,具备较好的包容能力,研究结果对空气涡轮起动机的包容结构设计具有很好的指导意义。

Aiming at the containment structure of an aero-engine ultra-high speed air turbine starter, the containment capacity was analyzed and verified. The Johnson-Cook constitutive model was used to simulate its containment capacity with LS-DYNA software, and the containment test was carried out on the ultra-high speed rotating test bench.The experimental results show that after the turbine disk is broken and files out, the main characteristics are the impact on the guide shell and the inner wall of the containment ring, and the circumferential sliding and scraping movement along the inner wall of the containment ring. The containment ring absorbs energy through its own deformation and the scraping and sliding between the inner wall and the turbine. The experiment results are in good agreement with the model simulation results, which shows that the containment structure can restrain the broken turbine disk, and has good containment capacity. The research results have a good guiding significance for the containment structure design of air turbine starter.