A method for calibrating and verifying the temperature of gas rotation on a rotating disk
A technology for rotating temperature and verification methods, which is applied in thermometers, jet engine testing, thermometer testing/calibration, etc. It can solve the problems of low temperature calibration accuracy and inability to verify temperature measurement accuracy, and achieve the effect of simple calibration and guaranteed measurement accuracy
Active Publication Date: 2022-03-15
NORTHWESTERN POLYTECHNICAL UNIV
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[0006] In order to overcome the shortcomings in the prior art that the temperature calibration accuracy is not high, and the temperature measurement accuracy cannot be verified for the calibrated thermocouple under the rotation condition, the present invention proposes a gas rotation temperature calibration and verification method on a rotating disk
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[0053] This embodiment is a gas rotation temperature calibration and verification method.
[0054] figure 1 It is a schematic diagram of the temperature calibration experimental setup. The temperature calibration device includes a data recorder 1 , a temperature scanning valve 3 , two first thermocouples 2 , two second thermocouples 6 and a thermos bottle 4 . Wherein, both the first thermocouple 2 and the second thermocouple 6 are K-type thermocouples, and the first thermocouple 2 has been calibrated by the Metrology Institute. The outer surface of the thermos bottle 4 is wrapped with an insulating layer; the insulating layer is made of phenolic foam with a thickness of 10mm. The two temperature measurement channels of the data logger 1 communicate with the reference ends of the two second thermocouples 6 respectively; the temperature scanning valve 3 has 16 measurement channels; the two temperature measurement channels are connected to the two The measurement ends of the ...
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Abstract
A method for calibrating and verifying the temperature of gas rotation on a rotating disk, using a temperature scanning valve, a data recorder, a K-type thermocouple, and a thermos bottle to calibrate the temperature measurement of the airflow on the rotating part, and using a heat-preserving water bath as a temperature source in a static state The measurement signal of the K-type thermocouple calibrated by a higher-precision device is used as the standard signal to calibrate the temperature measurement signal of the data recorder, thereby improving the measurement accuracy of the airflow temperature on the rotating disk, and the measurement error of the rotation temperature can be controlled within ±1 ℃, and can test the calibration effect in the rotating state. The invention can easily calibrate and test the gas rotation temperature measurement, and provide calibration and verification means for the flow heat transfer experiment of the rotating disc cavity of the aero-engine air system, including the rotation temperature measurement of the aero-engine pre-rotation system temperature drop characteristic experiment, to ensure The measurement accuracy of the rotation temperature provides data support for the design of the internal rotating disk cavity system of the aero-engine.
Description
technical field [0001] The invention relates to the field of aero-engine air systems, in particular to a method for calibrating and verifying the temperature of gas rotation on a rotating disk. Background technique [0002] At present, the improvement of aero-engine performance requires a corresponding increase in the gas temperature before the turbine inlet. For every 55°C increase, the thrust of the engine can be increased by about 10%. The temperature before the turbine of a modern aero-engine has exceeded 2000K, which is much higher than the temperature resistance limit of the metal material of the high-temperature parts of the engine. It is difficult to simply increase the temperature resistance limit of the metal material to meet the needs of engine performance improvement and safe operation, and more needs The relatively low-temperature air is extracted from the compressor and passed through the air system to effectively cool high-temperature components such as turbin...
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IPC IPC(8): G01M15/14G01M15/02G01K15/00
CPCG01M15/14G01M15/02G01K15/005
Inventor刘高文雷昭王俊凇宋月龙李鹏飞
OwnerNORTHWESTERN POLYTECHNICAL UNIV