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Fiber bragg grating total temperature measuring device capable of realizing heat conduction error correction

A fiber grating, thermal conductivity error technology, applied in measuring devices, measuring heat, thermometers with physical/chemical changes, etc., can solve the problem that the fiber grating total temperature probe cannot accurately measure the total airflow temperature, reduce the temperature measurement accuracy, and increase the thermal conductivity. Error and other problems, to achieve the effect of improving temperature measurement accuracy, high flexibility and small size

Pending Publication Date: 2021-12-07
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of measuring the total temperature of the existing FBG total temperature measurement device, due to the large temperature deviation between the temperature sensing point and the support, the measurement results often contain large thermal conductivity errors, resulting in inaccurate FBG total temperature probes. Measuring the total temperature of the airflow reduces the accuracy of temperature measurement
However, the existing heat conduction error calculation models usually model the total temperature probe as a straight fin, which will be affected by convective heat transfer along the sensor surface

Method used

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  • Fiber bragg grating total temperature measuring device capable of realizing heat conduction error correction
  • Fiber bragg grating total temperature measuring device capable of realizing heat conduction error correction
  • Fiber bragg grating total temperature measuring device capable of realizing heat conduction error correction

Examples

Experimental program
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Effect test

Embodiment 1

[0053] see Figure 1 to Figure 5 , a fiber grating total temperature measurement device capable of correcting thermal conduction errors, comprising a mounting base 1, a bracket 2, a total temperature probe 6 and a bracket temperature probe 7.

[0054] The installation base 1 is used to support the bracket 2 .

[0055] A plurality of total temperature probe mounting holes 3 are provided on the side facing the airflow of the support 2 .

[0056] The support 2 is a hollow cylinder.

[0057] The bottom end of the bracket 2 is provided with a bracket temperature probe installation hole 5 .

[0058] The back airflow side of the bracket 2 is provided with a plurality of outlet holes 4 for the grating support tube of the total temperature probe.

[0059] The total temperature probe 6 is fixed on the bracket 2 through the total temperature probe installation hole 3 .

[0060] The total temperature probe 6 is used to monitor the total temperature of the high-speed airflow.

[0061]...

Embodiment 2

[0083] A fiber grating total temperature measuring device capable of correcting heat conduction errors, comprising an installation base 1, a bracket 2, a total temperature probe 6 and a bracket temperature probe 7.

[0084] The installation base 1 is used to support the bracket 2 .

[0085] A plurality of total temperature probe mounting holes 3 are provided on the side facing the airflow of the support 2 .

[0086] The support 2 is a hollow cylinder.

[0087] The bottom end of the bracket 2 is provided with a bracket temperature probe installation hole 5 .

[0088] The total temperature probe 6 is fixed on the bracket 2 through the total temperature probe installation hole 3 .

[0089] The total temperature probe 6 is used to monitor the total temperature of the high-speed airflow.

[0090] The bracket temperature probe 7 is fixed in the bracket 2 through the bracket temperature probe mounting hole 5 .

[0091] The bracket temperature probe 7 is used to monitor the temper...

Embodiment 3

[0093] A fiber grating total temperature measurement device capable of correcting thermal conduction errors, the main structure is shown in Example 2, wherein, the back airflow side of the support 2 is provided with a number of lead-out holes 4 for the total temperature probe grating support tube.

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Abstract

The invention discloses a fiber bragg grating total temperature measuring device capable of realizing heat conduction error correction. The fiber bragg grating total temperature measuring device comprises a mounting base (1), a bracket (2), a total temperature probe (6) and a bracket temperature probe (7). The invention provides the fiber bragg grating total temperature measuring device capable of realizing heat conduction error correction. The device can correct heat conduction errors, improve the temperature measurement precision and improve the accuracy of measured data, the overall size of the device is small, the structure is flexible, and the heat conduction errors of a plurality of total temperature probes can be corrected at the same time.

Description

technical field [0001] The invention relates to the technical field of airflow total temperature measurement, in particular to an optical fiber grating total temperature measurement device capable of correcting heat conduction errors. Background technique [0002] In the field of aerospace, the total temperature of high-speed airflow is a very important test parameter, which is mainly used to evaluate equipment performance and carry out status monitoring. Accurate measurement of high-speed airflow temperature can provide necessary data support for the design, production, test and use of aero-engines, and plays a vital role in the verification of technical indicators and reliability evaluation of aero-engines. [0003] The total temperature of the high-speed airflow refers to the temperature that the airflow can reach under the state of adiabatic stagnation. In the actual measurement process, there are often many measurement errors including heat conduction error, velocity er...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/3206G01K13/024
CPCG01K11/3206G01K13/024
Inventor 刘显明韩国庆章鹏雷小华任怡霖昌小小
Owner CHONGQING UNIV
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