Research on the adjustment mechanism of inlet guide vanes in axial compressors

进口可调导叶在轴流压气机中的调节机制研究

¹ Civil Aviation Flight University of China, Guanghan 618300, China
² MTU Maintenance Zhuhai Co., Ltd., Zhuhai 519030, China
³ School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

Received: 14 July 2025

Abstract

To further elucidate the adjustment mechanism of inlet guide vanes in axial compressors of aero-engines, this paper investigates a 1.5-stage high-load compressor using numerical simulation methods. This study comprehensively examines the influence law of various setting angles of in-let guide vanes at different corrected speeds on compressor performance. The results indicate that positive pre-swirl adjustment of the inlet guide vane significantly extends the stable operating range of the compressor while improving pressure ratio and efficiency. By analyzing the pressure ratio, efficiency, and stability margin under different pre-swirl angles, an efficiency-optimized adjustment strategy was developed. This strategy enhances the stability margin of the compressor by 5.31%, 6.33%, and 3.84% at 85%, 75%, and 65% corrected speeds, respectively, demonstrating notable improvement. These findings provide a theoretical basis for optimizing inlet guide vane adjustment strategies in axial compressors.

摘要

为进一步揭示轴流压气机进口可调导叶的调节机制, 以某1.5级高负荷压气机为研究对象, 基于数值模拟方法, 详细探究了在不同换算转速下进口可调导叶的多种调节角度对压气机性能的综合影响规律。结果表明, 进口可调导叶的正预旋调节能够显著拓宽压气机的稳定工作范围, 提高压气机的压比和效率。对比分析不同预旋角度下压气机的压比、效率及稳定裕度, 制定了一套以最高效率为目标的调节策略, 能够在85%, 75%及65%换算转速下将压气机的稳定裕度分别提升5.31%, 6.33%及3.84%, 提升效果显著。研究结果为优化进口可调导叶在轴流压气机中的调节策略提供了理论依据。