K型同轴热电偶制备工艺对热乘积系数的影响研究
DOI:
CSTR:
作者:
作者单位:

1.南京理工大学机械工程学院;2.96901部队24分队

作者简介:

通讯作者:

中图分类号:

TN05

基金项目:


Study on the Influence of K-type Axial Thermoelectric Couple Fabrication Process on Thermal Conductance Coefficient
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    同轴热电偶凭借其出色的抗冲刷能力及在复杂恶劣环境中的测量能力,在爆炸场热流测量领域有巨大的应用前景。热乘积系数是同轴热电偶测量精度的重要参数之一,其值会随传感器材料的性质、类型以及制备过程中工艺差异而改变。因此,需要对制备的传感器进行热乘积系数的标定。K型同轴热电偶的表面结点主要通过刀片划痕、金刚石磨棒和砂纸形成,不同结点形成方式对热乘积系数存在影响。目前,尚无从200目到800目之间的不同目数的砂纸对其影响的研究,通过对不同目数砂纸、刀片单向划痕和金刚石磨棒单向研磨制备的传感器的热乘积系数进行实验,研究其影响规律。 实验结果表明,单向划痕和研磨的同轴热电偶的热乘积系数会更接近该方向上材料的热乘积系数值,而砂纸打磨制备的传感器随着砂纸目数的增加,其数值也会随之增大,200目相较于800目制备的传感器热乘积系数低约20%。同时通过数值模拟研究了横向传热会造成热结点存在过热情况,通过加装不锈钢衬套来降低其影响,实验结果表明有无衬套会相差约1%-2%。该结论可为K型同轴热电偶传感器的结构优化提供理论基础。

    Abstract:

    The coaxial thermocouple has a great application prospect in the field of heat flow measurement in explosion field because of its excellent anti-erosion performance and measuring ability in complex and harsh environment. The thermal product coefficient is one of the important parameters of the measurement accuracy of coaxial thermocouple, and its value will change with the nature and type of sensor material and the process difference in the preparation process. Therefore, it is necessary to calibrate the thermal product coefficient of the prepared sensor. At present, the surface joint of K-type coaxial thermocouple is mainly formed by blade scratches, diamond grinding rod and different mesh sandpaper, and different joint formation methods have an effect on the thermal product coefficient. At present, there is no research on the influence of sandpaper with different mesh numbers from 200 mesh to 800 mesh. The thermal product coefficient of the sensor prepared by sandpaper with different mesh numbers, single blade scratch and single diamond grinding rod was tested to study its influence rule. The experimental results show that the thermal product coefficient of the coaxial thermocouple with unidirectional scratch and grinding is closer to the value of the thermal product coefficient of the material in this direction, and the value of the sensor prepared by sandpaper will increase with the increase of the number of sand paper mesh, and the thermal product coefficient of the sensor prepared by 200 mesh is about 20% lower than that prepared by 800 mesh. At the same time, through numerical simulation, the transverse heat transfer will cause overheating of hot joints, and the influence is reduced by installing stainless steel bushing. The experimental results show that the difference between the presence and absence of bushing is about 1%-2%. The conclusion of this study can provide theoretical basis for the structural optimization of K-type axial thermocouple sensors.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2024-10-18
  • 最后修改日期:2024-11-12
  • 录用日期:2024-11-12
  • 在线发布日期:
  • 出版日期:
文章二维码
×
《国外电子测量技术》
财务封账不开票通知