航空发动机封严技术的进展

封严技术一直是高性能航空发动机研发工作的重要组成部分，先进封严技术是满足发动机耗油率、推重比、污染物排放、耐久性及寿命期成本目标的关键技术。通过减少发动机内部气流的泄漏量，可大大提高发动机的性能和效率。本文针对航空发动机典型封严技术，详细介绍了石墨封严、篦齿封严、刷式封严的结构特点及其技术改进和发展趋势。重点阐述了德国...

Improvement of Aero-Engine Sealing Technology

Sealing technology has always been a significant part of high-performance aero-engine development.And advanced sealing technology is the key to achieve lower SFC,higher thrust-to-weight ratio,less emission,improved endurance and less life cycle cost.The performance and efficiency of aero-engines can be greatly improved by reducing the leakage of inner flow.Focusing on the typical seal technology used in aero-engines,this paper introduces the features,technology improvement and development tendencies of grap...