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叶尖定时测量误差的高精度实验分析与修正

蒙一鸣 肖志成 欧阳华

蒙一鸣, 肖志成, 欧阳华. 叶尖定时测量误差的高精度实验分析与修正[J]. 航空动力学报, 2024, 39(7):20220475 doi: 10.13224/j.cnki.jasp.20220475
引用本文: 蒙一鸣, 肖志成, 欧阳华. 叶尖定时测量误差的高精度实验分析与修正[J]. 航空动力学报, 2024, 39(7):20220475 doi: 10.13224/j.cnki.jasp.20220475
MENG Yiming, XIAO Zhicheng, OUYANG Hua. High-accuracy experimental analysis and correction of blade tip timing measurement error[J]. Journal of Aerospace Power, 2024, 39(7):20220475 doi: 10.13224/j.cnki.jasp.20220475
Citation: MENG Yiming, XIAO Zhicheng, OUYANG Hua. High-accuracy experimental analysis and correction of blade tip timing measurement error[J]. Journal of Aerospace Power, 2024, 39(7):20220475 doi: 10.13224/j.cnki.jasp.20220475

叶尖定时测量误差的高精度实验分析与修正

doi: 10.13224/j.cnki.jasp.20220475
基金项目: 国家科技重大专项(J2019-Ⅱ-0005-0025); 中国联合重燃专项(19UGTC037)
详细信息
    作者简介:

    蒙一鸣(1998-),男,硕士生,主要从事叶轮机械振动测试相关研究

    通讯作者:

    欧阳华(1973-) 男,研究员、博士生导师,博士,主要从事航空发动机气动声学及风扇/压气机气动弹性相关研究。E-mail:oyh@sjtu.edu.cn

  • 中图分类号: V19

High-accuracy experimental analysis and correction of blade tip timing measurement error

  • 摘要:

    叶顶位移的精确测量是叶尖定时(BTT)技术应用于旋转叶片振动模态重构和实时状态监测的基础。设计了一套基于激光位移传感器的高精度BTT标定装置,在实验中直接获取叶顶位移的时域标定数据,并以此确定了转速波动是叶顶位移测量误差的主要来源之一。在此基础上,提出了局部5阶拟合的转速波动修正方法以提升BTT测量精度,并在标定装置上完成实验验证。结果表明:局部5阶拟合的转速波动修正方法在不同工况下均能有效提高BTT测量准确度。在旋转叶片非线性升转状态下测量误差最高降低90%;在恒定转速条件下误差可以降低38%至63%。将该算法应用在一台单级轴流压气机的实验数据中,修正的误差达0.4 mm,有效降低了BTT技术实时测量叶顶位移量的不确定度。

     

  • 图 1  叶顶位移测量示意图

    Figure 1.  Schematic diagram of blade tip deflection measurement

    图 2  BTT标定实验装置

    Figure 2.  Calibration test bench of BTT

    图 3  悬臂径向位移仿真结果

    Figure 3.  Cantilever radial displacement simulation results

    图 4  叶片坎贝尔图

    Figure 4.  Campbell diagram of blades

    图 5  传感器安装位置

    Figure 5.  Sensor installation angle

    图 6  叶顶位移的实际值与测量值

    Figure 6.  Actual and measured value of tip displacement

    图 7  测量值与真值相关系数

    Figure 7.  Correlation coefficient between measurement and true data

    图 8  总误差概率密度分布

    Figure 8.  Probability density distribution of total error

    图 9  总误差与轴位置误差关系

    Figure 9.  Relationship between total error and shaft position error

    图 10  残余误差概率密度分布

    Figure 10.  Probability density distribution of residual error

    图 11  升转状态下的误差与修正结果

    Figure 11.  Error and correction results at increased speed

    图 12  稳定工况下的误差与修正结果

    Figure 12.  Errors and correction results under stable conditions

    图 13  相对误差的标准差与键相标识个数

    Figure 13.  Standard deviation of relative error and number of key-phases

    图 14  稳定工况下误差修正结果

    Figure 14.  Error correction results under stable conditions

    图 15  单级压气机实验台

    Figure 15.  Rotor of single-stage compressor test bench

    图 16  叶片振动位移

    Figure 16.  Blade vibration displacement

    图 17  叶片安装角与相对误差

    Figure 17.  Blade installation angle and relative error

    表  1  实验工况

    Table  1.   Experimental conditions

    工况稳定转速/(r/min)附加激励频率/Hz
    A300
    B600
    C900
    D1200
    E30053.8
    F60054.6
    G90056.1
    H120057.5
    下载: 导出CSV

    表  2  总误差与轴位置误差相关的系数

    Table  2.   Correlation coefficient between total error and shaft position error

    传感器编号安装角度/(°)相关系数
    180.20.9910
    2176.80.9934
    3206.70.9936
    4249.50.9896
    5273.90.9916
    6302.70.9825
    7336.50.9829
    下载: 导出CSV
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  • 收稿日期:  2022-07-02
  • 网络出版日期:  2023-10-23

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