摘要
非真空环境下,基于电替代测量原理的辐射热流计存在光电不等性来源复杂、难以开展实验测试修正等问题。为了进一步提高辐射热流计的测量准确度,首先分析辐射热流计光电不等效来源,其次结合传热学理论和限元分析法建立辐射热流计热结构模型,并以真空-空气比对实验验证有限元模型的有效性,最后基于有限元热结构模型对传热过程的不等效性进行修正。有限元模型的真空-空气响应度测试结果与实验测试结果相差1.7%,传热时存在的不等效为0.28%。光电不等效修正系数为1.00235,相对不确定度为0.29%。通过上述方法完善了辐射热流计的修正体系,提高测量准确度,并为其优化改进提供指导性建议。
In non-vacuum environments,radiation heat flux meters based on the electric substitution mea-surement principle face challenges such as intricate photoelectric inequality and hurdles in experimental test-ing and correction.To enhance the meter's accuracy,the photoelectric inequivalence source of the radiant heat flow meter was first analyzed.Subsequently,a thermal structure model for the radiant heat flow me-ter was developed by combining heat transfer theory with finite element analysis.The model's validity was then ascertained via a vacuum-to-air ratio experiment.Using this finite element thermal structure model,adjustments were made to address the inequivalence in the heat transfer process.The difference between the test results of vacuum-air responsiveness of the finite element model and experimental results is 1.7%,and the inequivalence of heat transfer is 0.28%.The photoelectric inequivalent correction coefficient is 1.00235,and the relative uncertainty is 0.29%.Hence,this approach refines the radiant heat flux me-ter's correction system,improves its measurement accuracy,and furnishes valuable recommendations for further optimization and enhancement.
作者
叶新
郑翔远
罗志涛
YE Xin;ZHENG Xiangyuan;LUO Zhitao(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of the Chinese Academy of Sciences,Beijing 100049,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2023年第20期2943-2950,共8页
Optics and Precision Engineering
基金
国家重点研发计划资助项目(No.2022YFB3903200)。
关键词
高精度
电替代
热流密度
光电不等效性
high precision
electric substitution
heat flux
photoelectric inequivalence
