飞行试验用双结点热电偶传感器研究及测量误差分析

沙心国; 文帅; 孙日明; 张宗波; 纪锋

doi:10.11729/syltlx20210035

飞行试验用双结点热电偶传感器研究及测量误差分析

doi: 10.11729/syltlx20210035

沙心国^1,,
文帅¹,
孙日明^1, ,,
张宗波²,
纪锋¹

1.
中国航天空气动力技术研究院，北京　100074
2.
中国科学院化学研究所，北京　100190

基金项目: 国家重点研发计划资助项目（2019YFA0405300）

详细信息

作者简介:
沙心国：（1987—），男，河北威县人，博士，高级工程师。研究方向：高速空气动力学及相关测试技术。通信地址：北京市7201信箱14分箱（100074）。E-mail：shaxg@163.com

通讯作者:
E-mail：srm1119@qq.com

中图分类号: V211.7
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- 文章访问数: 447
- HTML全文浏览量: 199
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- 被引次数: 0
出版历程
- 收稿日期: 2021-04-08
- 修回日期: 2021-07-20
- 录用日期: 2021-08-09
- 网络出版日期: 2022-02-17
- 刊出日期: 2022-10-01

A dual-junction thermocouple for flight test and its measurement error analysis

1.
China Academy of Aerospace Aerodynamics, Beijing　100074, China
2.
Institute of Chemistry, Chinese Academy of Sciences, Beijing　100190, China

摘要

摘要: 高超声速飞行试验气动热测量对快响应、小型化的热流传感器提出了需求，双结点热电偶传感器具有响应快、尺寸小、测量信息丰富等优点，是飞行试验热流测量的优质解决方案。以双结点热电偶传感器为研究对象，开展了传感器测量原理、传感器结构以及测量方法研究，并将该传感器应用于飞行试验模型壁面温度测量。试验结果表明：双结点热电偶传感器可同时测量模型表面温度和背面温度；背温测量误差相对较大，背温测量结点尺寸较大、背温测量结点与模型壁面之间的绝缘涂层是影响背温测量结点热响应的主要原因。针对双结点热电偶传感器，目前尚缺乏相应的热流辨识方法。
- 温度测量 /
- 飞行试验 /
- 双结点 /
- 热电偶 /
- 误差分析
Abstract: The flight test needs fast response and small transducer for heat flux measurement. The dual-junction thermocouple, which is characterized by fast response, small size and abundant measured information, is one of the best solutions for the temperature and heat flux measurement in the flight test. The principle, structure and measurement method of the dual-junction thermocouple are studied, and dual-junction thermocouples are used in a flight test for the model surface temperature measurement. The model front-surface and back-surface temperatures were measured simultaneously by the dual-junction thermocouples, and it is found that the measured back-surface temperature has a greater error. The response time of the back-surface measurement point is much longer than that of the front-surface measurement point, which is affected by the junction size and the insulating coating between the junction point and the model surface. At present there is still a lack of the corresponding heat flux estimation method for the dual-junction thermocouple.
- temperature measurement /
- flight test /
- dual-junction /
- thermocouple /
- error analysis

HTML全文

图 1 塞贝克效应原理示意图

Figure 1. Seebeck effect

下载: 全尺寸图片幻灯片

图 2 传感器结构示意图

Figure 2. Dual-junction thermocouple structure

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图 3 传感器安装示意图

Figure 3. Illustration of the dual-junction thermocouple installment

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图 4 传热计算模型示意图

Figure 4. Illustration of heat transfer computation

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图 5 模型某点的壁面温度信息

Figure 5. Surface temperature of a flight model point

下载: 全尺寸图片幻灯片

表 1 测量方案

Table 1. Measurement methods

测量方案	测量通道	参考端–测量端	测量信息
1	CH1–CH2	远端–结点1	T₁
1	CH1–CH3	远端–结点2	T₂

2	CH1–CH2	远端–结点1	T₁
2	CH2–CH3	结点2–结点1	T₁－T₂

3	CH1–CH3	远端–结点2	T₂
3	CH2–CH3	结点2–结点1	T₁－T₂

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