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A non-contact temperature field distance error calibration method for aero-engine hot end components

A technology for aero-engine and hot-end components, which is applied in the field of non-contact dynamic temperature field distance error calibration of hot-end components, can solve the problems of numerous influencing factors, harsh working environment of aero-engine temperature measuring instruments, and high technical indicators

Active Publication Date: 2022-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The development and application of calibration methods are very difficult due to the harsh working environment, various influencing factors, and high technical indicators of aircraft engine temperature measuring instruments.

Method used

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  • A non-contact temperature field distance error calibration method for aero-engine hot end components
  • A non-contact temperature field distance error calibration method for aero-engine hot end components
  • A non-contact temperature field distance error calibration method for aero-engine hot end components

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Embodiment Construction

[0029] In order to illustrate the technical solutions of the implementation examples of the present invention more clearly, the examples are further described in detail below in conjunction with the accompanying drawings. The content described here is only for explaining the present invention, and is not intended to limit the present invention.

[0030] The technical route of the distance error calibration method is as follows: figure 1 As shown, the voltage data obtained by the experiment is converted into the corresponding temperature and then compared with the standard temperature of the black body furnace, and then the distance compensation is completed through the BP neural network algorithm to obtain the calibration value. Perform a secondary comparison of the calibration value with the reference value and analyze whether the error is within an acceptable range. If the error is large and not within the acceptable range, then continue to optimize until the requirement is ...

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Abstract

The invention discloses a non-contact temperature field distance error calibration method for an aero-engine hot end part, belonging to the technical field of aero-engine temperature measurement. Since the actual test environment and the calibration environment of the aeroengine cannot be exactly the same, and the distance cannot be kept constant, which will affect the original calibration curve. Therefore, when changing the experimental test environment, it is necessary to make compensation corrections to the overall system. The invention explores the mathematical model of the system compensation function, and defines the radiation attenuation function as a linear form based on a two-point calibration method combined with a BP neural network algorithm. Taking the standard temperature of the blackbody furnace as a reference, two points in the experiment are selected for compensation and correction, which improves the temperature measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of aero-engine temperature measurement, and discloses a non-contact dynamic temperature field distance error calibration method for hot end components. Background technique [0002] During the development of high-performance, high-thrust-to-weight ratio engine technology, the precise measurement of the temperature of the hot-end parts of the engine plays an increasingly prominent role in the guarantee and maintenance tasks of mechanical equipment such as turbines. As the combustion temperature increases, the internal environment of the engine becomes harsher, and various parameters change more drastically. In order to improve the working reliability of the blade and prolong its life, it is necessary to accurately measure, study and analyze the temperature distribution of the turbine blade, analyze its surface temperature field, and understand its thermal stress distribution, so as to improve the blade materi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/53G06N3/08
CPCG01J5/52G06N3/084
Inventor 王超姜晶牛夷陈梦朝张泽展喻培丰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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