首页|三级高速轴流压气机变转速导静联调特性及流动机理研究

三级高速轴流压气机变转速导静联调特性及流动机理研究

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变转速及变导静叶片角度是实现轴流压气机扩稳增效的两个最有效性能调节方法,对航机、燃机、工业压缩系统的高效宽工况运行具有重要影响.本文针对多级高速轴流压气机易出现低转速下裕度不够的问题,对某3.5级高速轴流压气机在100％～70％设计转速范围内四种转速下的内部流动进行了全三维定常数值模拟,重点分析了低转速下的失速特性及其流动失稳机理.结果表明:100％、90％设计转速下失速裕度为16.58％、32.22％;在80％、70％设计转速下失速裕度分别为0.22％、0.34％,性能曲线表现出突变失速的不连续性.分析流动机理后发现80％转速下流动失稳现象为R1叶尖部分叶高失速,该失速无法通过增大流量解除;70％转速下流动失稳现象为S2角区分离引起S3双开型角区分离失速,该失速可通过增大流量解除.研究工作对完善多级高速轴流压气机导静叶调节扩稳设计具有指导价值.
Performance and Flow Mechanism of a Three-stage Transonic Axial-Flow Compressor With Combined Rotating Speed and IGV-stator Adjustment
The variable rotating speed and variable inlet guide vane(IGV)-stator geometry are two effective ways of improving stall margin and adiabatic efficiency for axial-flow compressor,and have great influence on stable operation range and overall efficiency of aero-engine,gas turbine and industry compression system.In this work,steady Reynolds averaged Navier-Stokes method is applied to predict four speed-lines of a 3.5-stage transonic axial-flow compressor with IGV-stator setting angles adjustment.The aerodynamic performance and internal flow field,especially the stall characteristics and instability mechanism at low rotating speeds,are analyzed in details.The results show that the stall margin of 100％and 90％speed-lines is 16.58％and 32.22％,respectively,while that of 80％and 70％speed-lines is 0.22％and 0.34％,respectively.Besides,the performance curve at 80％and 70％speed-lines shows discontinuity and hysteresis characteristics of abrupt rotating stall.The stall at 80％speed-line is located at the tip of the first stage rotor and this condition cannot be removed by increasing mass flow rate.At 70％speed-line,the third stage stator double-open corner separation stall is evoked by the second stage stator corner separation and can be removed by increasing mass flow rate.This work is of reference value for the development of IGV-stator adjustment technology and the enhancement of flow stability for multi-stage transonic axial-flow compressor.

multi-stage transonic axial-flow compressorcombined rotating speed and igv-stator adjustmentabrupt rotating stallnumerical simulation

花雨、李聪、琚亚平、张楚华

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西安交通大学能源与动力工程学院,西安 710049

中国航空发动机集团沈阳发动机研究所,沈阳 110015

多级高速轴流压气机 变转速导静叶联调 突变失速 数值模拟

国家重大科技专项专题国家重点研发计划课题国家自然科学基金资助项目

2017-Ⅱ-0006-00202016YFB020090151776154

2024

工程热物理学报
中国工程热物理学会 中国科学院工程热物理研究所

工程热物理学报

CSTPCD北大核心
影响因子：0.4
ISSN：0253-231X
年,卷(期)：2024.45(2)
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