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基于热电偶反串的温升效率测量不确定度分析

高杰 向宏辉 吴森林 张军 温珍荣

高杰,向宏辉,吴森林,等.基于热电偶反串的温升效率测量不确定度分析[J].航空动力学报,2022,37(8):1732‑1739. doi: 10.13224/j.cnki.jasp.20210276
引用本文: 高杰,向宏辉,吴森林,等.基于热电偶反串的温升效率测量不确定度分析[J].航空动力学报,2022,37(8):1732‑1739. doi: 10.13224/j.cnki.jasp.20210276
GAO Jie,XIANG Honghui,WU Senlin,et al.Uncertainty analysis of compressor temperature rise efficiency measurement based on thermocouple inversed connection[J].Journal of Aerospace Power,2022,37(8):1732‑1739. doi: 10.13224/j.cnki.jasp.20210276
Citation: GAO Jie,XIANG Honghui,WU Senlin,et al.Uncertainty analysis of compressor temperature rise efficiency measurement based on thermocouple inversed connection[J].Journal of Aerospace Power,2022,37(8):1732‑1739. doi: 10.13224/j.cnki.jasp.20210276

基于热电偶反串的温升效率测量不确定度分析

doi: 10.13224/j.cnki.jasp.20210276
基金项目: 

民用飞机专项科研项目 MJ⁃2016⁃J⁃96

详细信息
    作者简介:

    高杰(1987-),男,高级工程师,硕士,主要从事压气机气动性能试验技术研究。

  • 中图分类号: V231.3

Uncertainty analysis of compressor temperature rise efficiency measurement based on thermocouple inversed connection

  • 摘要:

    针对轴流压气机气动性能试验中存在的低压比温升效率评估问题,构建了常规测温方法与反串测温方法测量的温升效率不确定度数学分析模型,并采用某单级压气机真实试验数据进行了两种测温方法不确定度的对比分析。结果表明:相比常规测温方法,反串测温方法不仅消除了热电偶冷端环境温度测量引入的不确定度,还大幅降低了进口温度测量引入的不确定度,使温升效率测量不确定度减小幅度在30%以上。

     

  • 图 1  常规测温方法示意图

    Figure 1.  Schematic diagram of conventional temperature measuring method

    图 2  反串测温方法示意图

    Figure 2.  Schematic diagram of temperature measuring method with inversed connection of thermocouple

    图 4  两种测量方法获取的压气机温升效率扩展不确定度分布曲线

    Figure 4.  Extended uncertainty of compressor temperature rise efficiency obtained by two measurement methods

    表  1  温升效率相对标准不确定度分量

    Table  1.   Relative standard uncertainty component of temperature rise efficiency

    转速常规方法反串方法
    相对流量uπut1,iu(Δtiutrefurη1相对流量uπut1,iu(Δtiutrefurη2
    50%nd0.369 60.004 70.024 00.019 10.002 70.031 10.371 40.004 70.002 30.018 00.018 8
    60%nd0.425 00.003 20.016 30.012 40.001 80.020 80.450 90.003 40.002 20.012 80.013 5
    70%nd0.505 60.002 40.012 80.009 30.001 30.016 00.491 10.002 40.002 20.008 80.009 4
    75%nd0.564 40.001 90.010 40.007 30.001 00.012 90.565 70.001 90.002 20.007 30.007 8
    80%nd0.599 00.001 40.007 80.005 00.000 70.009 40.638 50.001 40.002 10.005 40.006 0
    下载: 导出CSV

    表  2  温升效率相对标准不确定度分量的权重系数

    Table  2.   Weight coefficient of each relative standard uncertainty component of temperature rise efficiency

    方法转速相对流量ζ/%
    uπut1,iu(Δtiutref
    常规方法50%nd0.369 62.2859.5537.720.75
    60%nd0.425 02.3761.4135.540.75
    70%nd0.505 62.2564.0033.790.66
    75%nd0.564 42.1765.0032.020.60
    80%nd0.599 02.2268.8528.290.55
    反串方法50%nd0.371 46.251.5091.67
    60%nd0.450 96.342.6689.90
    70%nd0.491 16.525.4887.64
    75%nd0.565 75.937.9687.59
    80%nd0.638 55.4412.2581.00
    下载: 导出CSV
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  • 收稿日期:  2021-06-02

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