航空发动机风扇叶片爆破飞断主动控制技术

为了实现在风扇机匣包容性试验中对叶片飞断转速的精确控制，开展了叶片飞断主动控制技术研究。提出了一种风扇 叶片爆破切割飞断的方法，进行了风扇叶片榫头的装药结构设计以及应用爆破技术的可行性分析；设计了遥控起爆系统，确保了 试验安全；根据静、动态双重验证的技术研究路线提出了详细的技术指标，使叶片飞出姿态满足试验器条件下包容性试验的技术 要求。结果表明：采用风扇叶片爆破切割飞断的方法顺利完成了某大涵道比发动机叶片在风扇机匣包容性试验指定转速下的爆 破飞断，叶片飞出的附加动能小于叶片飞失动能的0.05%，叶片飞断转速的控制精度在0.1%以内。验证了该项技术在试验器条件 下完成风扇机匣包容性试验的有效性，并为整机包容性试验奠定了基础。

Active Control Technology of Explosive Blade-off in Aeroengines Fan

In order to achieve accurate control of blade-off rotational speed in the fan casing containment test, active control technology of blade-off was studied. An explosive blade-off method was proposed, and the structure design of the fan blade root for explosive charge loading was carried out, as well as the implementation feasibility analysis. A remote control initiation system was designed to ensure the safety of the test. According to the static and dynamic verification scheme, detailed technical specifications were proposed to ensure the attitude of the released blade meets the technical requirements of the containment evaluation test under rig test conditions. The results show that the method of detonating, cutting, and fan blade releasing was successfully applied to the fan casing containment test of a high bypass ratio engine at the specified rotational speed. The additional kinetic energy is less than 0.05% of the kinetic energy of the released blade, and the rotational speed control accuracy of the blade-off is within 0.1%. The effectiveness of this technique in completing the fan casing containment test under rig test conditions is verified, and the foundation for the whole engine containment test is laid.