航空发动机涡轮机匣轮盘包容性研究

为研究某航空发动机辅助动力装置涡轮盘在预定转速范围内破裂后涡轮机匣的包容能力,在高速旋转试验器上进行了涡轮机匣的包容性试验.试验采用轮盘周向3个对称位置预制裂纹的方式,使轮盘在预定转速范围内破裂成均匀3块,得到了轮盘碎块撞击涡轮机匣的高速摄影照片.试验结果表明轮盘碎块击穿机匣撞击包容环,包容环发生大塑性变形,包住轮盘碎块.采用LS-DYNA软件对涡轮机匣包容性进行数值仿真,仿真结果与试验结果吻合良好,研究结果对航空发动机轮盘包容性设计有一定的参考价值. 

Investigation on disk containment of aero-engine turbine casing

To investigate an aero-engine auxiliary power unit turbine disk burst at the predict speed impact on the turbine casing containment, the casing containment test was conducted on a high speed spin tester. The prefabricating cracks were cut at three positions separated on the disk circumferential to make the disk burst at the predicted speed, the impacting process was recorded on the film by a hi-speed camera. The test results show that, the casing was penetrated and the disk fragments were successfully contained within the containment ring and sever plastic deformation was found in the containment ring. The numerical simulations were carried out using LS-DYNA to study the turbine casing containment, the simulation results show a good agreement with the test results. The results can be used as a reference for the engine disk containment design.