基于传热学的低气压/真空综合环境试验设备校准技术研究

doi:10.3969/j.issn.1000-1158.2019.04.21

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Abstract The referenceable calibration basis for low pressure/vacuum integrated environmental test equipment is not comprehensive at present, the analysis of applicable standard specification for low pressure integrated test equipment of different pressure ranges is given and the guiding conclusions are conducted through a numerical simulation. Numerical simulation results show that the test equipment with internal pressure greater than 1kPa can refer to standard GB/T 5170.10 for the calibration of temperature deviation and temperature uniformity. The tolerance requirement can be appropriately relaxed according to the increase of the working space and the decrease of the internal pressure. Radiation heat transfer occupy a dominant position in test equipment with air pressure less than 1kPa. The heat transfer efficiency is related to the placement of internal test pieces. It is not necessary to consider the temperature uniformity of the equipment. Reducing the space thermal resistance and surface thermal resistance in the measurement are the key to improving the measurement accuracy.

Key words： metrology environmental test equipment low pressure/vacuum numerical simulation natural convection radiation heat transfer

Received: 04 April 2018 Published: 10 June 2019

PACS:

TB935

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	Articles by authors
	ZHAO Wen-tao
	CHENG Lei
	SHEN Hui-feng
	CAO Jia-xing
	NI Bo

Cite this article:

ZHAO Wen-tao,CHENG Lei,SHEN Hui-feng, et al. Study on Calibration of Low Pressure/Vacuum Comprehensive Environmental Test Equipment Based on Heat Transfer Theory[J]. Acta Metrologica Sinica, 2019, 40(4): 676-680.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2019.04.21 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2019/V40/I4/676

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