Abstract: Different aerodynamic configurations of the core driven fan stage (CDFS) in the variable cycle engine have been investigated with DENTON code. Different spanwise distributions of preswirl and rotor loading were also investigated. Numerical results show that: The configuration using the CDFS stator as the high pressure compressor inlet guide vane provides better CDFS performance, and reduces the compressor weight.The CDFS efficiency is mainly influenced by the rotor efficiency and the stall margin of the CDFS is mainly influenced by the stator aerodynamic load. The overall performance of the CDFS can be improved by increasing the total pressure ratio at the inner span of the rotor.

Key words: Core driven fan stage; Aerodynamic configuration; Aerodynamic design; Variable cycle engine

摘要： 以某核心机驱动风扇级(Core driven fan stage,简称CDFS)的气动方案为例,使用新版Denton程序通过数值模拟分析了气动布局、预旋分布和转子径向负荷分布对CDFS性能的影响。数值结果表明:利用CDFS静子取代高压压气机进口导叶是一种紧凑高效的CDFS气动布局；CDFS效率所受的影响主要来自转子效率的变化,工作裕度所受的影响主要来自静子负荷的变化；增加CDFS转子叶根的设计压比可以降低CDFS静子叶根的气动负荷,从而使CDFS获得更为均衡的性能。

关键词: 核心机驱动风扇级;气动布局;气动设计;变循环发动机