• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (2): 216-224.doi: 10.3901/JME.2018.02.216

• 交叉与前沿 • 上一篇    下一篇

叶片加工超差对高压压气机性能影响和敏感性分析

郑似玉, 滕金芳, 羌晓青   

  1. 上海交通大学航空航天学院 上海 200240
  • 收稿日期:2017-03-18 修回日期:2017-08-29 出版日期:2018-01-20 发布日期:2018-01-20
  • 通讯作者: 滕金芳(通信作者),女,1968年出生,研究员,博士研究生导师。主要研究方向为航空发动机压气机性能模拟、优化及流场测量。E-mail:tjf@sjtu.edu.cn
  • 作者简介:郑似玉,女,1994年出生。主要研究方向为压气机性能仿真。E-mail:zhengsiyu@sjtu.edu.cn;羌晓青,男,1982年出生,副研究员,硕士研究生导师。E-mail:qiangxiaoqing@sjtu.edu.cn
  • 基金资助:
    航空基金资助项目(2015ZB57006)。

Sensitivity Analysis of Manufacturing Variability on High-pressure Compressor Performance

ZHENG Siyu, TENG Jinfang, QIANG Xiaoqing   

  1. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2017-03-18 Revised:2017-08-29 Online:2018-01-20 Published:2018-01-20

摘要: 在航空发动机中,高压压气机叶片的加工超差难以避免,势必对压气机的气动性能造成影响。以某高压压气机后面级作为研究对象,采用数值模拟方法,对典型的高压压气机加工超差种类进行敏感性分析。首先,选取位置度、轮廓度及扭转度三种典型加工超差,采用高斯分布概率密度函数确定超差分布;其次,通过数值模拟,研究加工超差对高压压气机等熵效率、总压比等气动性能的影响规律,提取气动性能对各类超差的敏感性参数。研究结果表明,当叶型位置度变化时,气动性能基本都呈恶化趋势,其中动叶根部轴向位置度某种变化情况使得喘振裕度减少25%之多;轮廓度与扭转度的变化与高压压气机气动性能呈负线性的变化趋势;在这三种典型超差类型中,高压压气机气动性能对扭转度及轴向位置度超差的敏感性较大,周向位置度和轮廓度次之。

关键词: 高压压气机, 加工超差, 敏感性分析, 气动性能

Abstract: Manufacturing variabilities of high-pressure compressor blades can hardly be avoided in aero-engines, which may seriously affect the aerodynamic performance of the compressors. To analyze the sensitivity of manufacturing variabilities on compressor performance, the rear stage of a high-pressure compressor is used to make the numerical simulation. Firstly, several typical manufacturing variabilities such as positional tolerance, profile tolerance and twisted tolerance are chosen and Gaussian distribution probability density function is used to determine the distribution of tolerance. Then the effective law of manufacturing variabilities to compressor's performance such as isentropic efficiency and total pressure ratio are investigated through numerical simulation, and the sensitivity parameters are extracted. The results indicate that when the position of blade changes, aerodynamic performance of high-pressure compressor are always reduced, for example, the axial position makes the surge margin decrease almost 25%, while profile and twisted tolerance can lead to negative linear variation; throughout these three variabilities, the sensitivity of performance to the blade twist and axial position are larger, while circular position and profile tolerance have minor effects.

Key words: aerodynamic performance, high-pressure compressor, manufacturing variability, sensitivity analysis

中图分类号: