高精度真空黑体温度场均匀性研究

doi:10.3969/j.issn.1000-1158.2022.10.06

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Abstract In order to further improve the temperature control accuracy of vacuum black body, the temperature distribution of vacuum black body is studied by means of theoretical analysis, numerical simulation and experiment, the heat transfer formula between black body and environment is derived, and the temperature distribution characteristics of vacuum black body are analyzed.For the specific black body structure, the corresponding temperature field control equation is further simplified, the three-dimensional model is simplified to a one-dimensional model without loss of precision, the calculation complexity is reduced, the simulation time is shortened, and the numerical stability in the process of solving is improved.The numerical results are in good agreement with the experimental data, but the global maximum temperature difference of vacuum black matter obtained by numerical simulation is about 3 times the temperature difference between measuring points, which indicates that the actual temperature control accuracy of black body is much lower than that of experiment results.

Key words： metrology vacuum blackbody temperature field uniformity radiant heat transfer

Received: 03 November 2021 Published: 14 October 2022

PACS:

TB942

Fund:National Key R&D Program of China;National Natural Science Foundation of China

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	Articles by authors
	WU Qiang
	HAO Xiao-peng
	SONG Jian
	LI Guo-zhan

Cite this article:

WU Qiang,HAO Xiao-peng,SONG Jian, et al. The Investigation on the Temperature Field Uniformity of a High-precision Vacuum Blackbody[J]. Acta Metrologica Sinica, 2022, 43(10): 1279-1284.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.10.06 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I10/1279

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