中文摘要：

利用三维数值工具对某变循环核心压机在设计转速下内、外涵节流特性进行了模拟,分析了核心机驱动风扇级、高压压气机以及二级涵道的工作特点和匹配关系,分析了变循环核心压气机的可调极限。研究结果表明,外涵道节流可以实现涵道比的大范围调节（0.243-0.062）,内涵道节流可以实现总增压比的大范围调节（0.81-1.13倍设计压比）。二级涵道出口导向叶片的失速和核心机驱动风扇级的堵塞决定了外涵道节流的可调极限,高压压气机的失速和堵塞决定了内涵道节流的可调极限。

英文摘要：

Throttling characteristics of a variable cycle core compressor under design rotation speed were investigated by use of a sophisticated CFD tool.Two different throttling schemes,primary flow throttling and bypass flow throttling,were considered.The operational features of each component,i.e.core-driven fan stage（CDFS）,high pressure compressor（HPC） and secondary bypass,during throttling were analyzed and the matching relationships between them were interpreted.The critical limit factors for cycle adapting were discussed.The results show that bypass flow throttling can realize a large range（0.243~0.062） of bypass ratio adjustment,while primary flow throttling can realize a large range（0.81-1.13） of total pressure ratio adjustment.Secondary bypass OGV＇s stall and CDFS＇ chock are the limiting factors of bypass ratio＇s adjustment and HPC＇s stall and chock are that of total pressure ratio＇s adjustment.