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变循环核心压气机可调特性的数值研究

发布时间:2018-12-06 13:55
【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。
[Abstract]:In this paper, the characteristics of external culvert throttling in a variable cycle core compressor are simulated by using three dimensional numerical tools, and the working characteristics and matching relationship of fan stage, high pressure compressor and two-stage ducts are analyzed. The adjustable limit of variable cycle core compressor is analyzed. The results show that the throttling of the external ducts can achieve a wide range regulation of the ratio of ducts to ducts (0.243% 0.062), and the throttling of the inner ducts can achieve a wide range adjustment of the total booster ratio (0.81g 1.13 times the design pressure ratio). The adjustable limit of external ducts throttling is determined by the stall of the outlet guide blade of the secondary ducts and the blockage of the fan stage driven by the core machine, and the adjustable limit of the internal channel throttling is determined by the stall and blockage of the high pressure compressor.
【作者单位】: 北京航空航天大学能源与动力工程学院;北京航空航天大学航空发动机气动热力国防重点实验室;先进航空发动机协同创新中心;
【基金】:国家自然科学基金资助项目(No.51376014)
【分类号】:V233


本文编号:2366132

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