Research on the Influence of Cavity Effect on Integrated Blackbody High-temperature Emissivity Measurement
SUN Luge1,AN Baolin2,ZHAO Yunlong2,WANG Bingkai3,ZHAI Huixing1, DONG Wei2,WANG Ruixiang1
1. Beijing Engineering Research Center of Sustainable Energy and Buildings,Beijing University of Civil Engineering and Architecture,Beijing 100044, China
2. National Institute of Metrology, Beijing 100029, China
3. Changchun University of Science and Technology, Changchun, Jilin 130022, China
Abstract Theoretical models for correction factors of non-isothermal boundary cavity effects in integrated blackbody method are proposed. Based on the finite element method, theoretical calculations of correction factors for non-isothermal boundary cavity effects are carried out under different emissivity samples and specific temperature fields. These calculations are compared with correction factors obtained based on the Monte Carlo ray tracing method, showing good agreement with a maximum deviation of no more than 2.5%. The results indicate that with longer wavelengths and lower sample emissivity, the cavity effect has a greater impact on emissivity measurement results. Emissivity measurements of platinum material samples are conducted at 1000°C temperature and within the wavelength range of 12~14μm. These measurements are compared with results obtained using the discrete blackbody method. After correction, the consistency between the integrated blackbody method and the discrete blackbody method is improved from 0.08 to 0.03. This result verifies the feasibility of introducing correction factors for non-isothermal boundary cavity effects in the theoretical model and improves the accuracy of emissivity measurement using this method.
SUN Luge,AN Baolin,ZHAO Yunlong, et al. Research on the Influence of Cavity Effect on Integrated Blackbody High-temperature Emissivity Measurement[J]. Acta Metrologica Sinica, 2024, 45(4): 520-526.
PROKHOROV A V, HANSSEN L M. Effective emissivity of a cylindrical cavity with an inclined bottom: II. Non-isothermal cavity ［J］. Metrologia, 2010, 47: 33-46.
XU F, YAO K K, ZhANG R J, et al. Test and evaluation technique for infrared radiation characteristics of aircraft engines［J］. Laser and Infrared, 2019, 49(10): 1223-1227.
POSTLETHWAIT M A, SIKKA K K, MODEST M F, et al. High-temperature, normal spectral emittance of silicon carbide-based materials ［J］. Journal of thermophysics and heat transfer, 1994, 8(3): 412-418.
［8］
SCHSSLER M, AUWETER-KURTZ M, HERDRICH G, et al. Surface characterization of metallic and ceramic TPS-material for reusable space vehicles ［J］. Acta Astronautica, 2009, 65: 676-686.
［9］
HERDRICH G, L HLR S, AUWETER-KURTZ M, et al. IRS ground-testing facilities: thermal protection system development, code validation, and flight experiment development［C］//37th AIAA Thermophysics Conference. Portland, 2004.
［11］
ZHANG T, SONG X Y, QI G, et al. Investigation of High-Temperature Normal Infrared Spectral Emissivity of ZrO2 Thermal Barrier Coating Artefacts by the Modified Integrated Blackbody Method［J］. Materials, 2021, 15(1): 235.
［15］
SAUNDERS P. Reflection errors and uncertainties for dual and multiwavelength pyrometers［J］. High Temperatures-High Pressures, 2000, 32(2): 239-249.
WANG C Z, TONG Z X, LU Y L, et al. Research on infrared radiation characteristics and detection techniques of aircraft［J］. Laser and Infrared, 2011, 41(9): 998-999.
HAN W, LIU Y, DU L, et al. Influence of Emissivity of Infrared Thermal Results of Semiconductor Device［J］. Acta Metrologica Sinica, 2021, 42(1): 35-40.
［7］
MASSUTI-BALLESTER B, PAGAN A, HERDRICH G. Determination of total and spectral Emissivity of Space-relevant Materials［C］//8th European Symposium on Aerothermodynamics for Space Vehicles. 2015.
ZHAO Y K, WANG J H, YUAN Z D, et al. Study on the Performance of the Low-temperature Blackbody Radiation Source［J］. Acta Metrologica Sinica, 2017, 38(5): 589-592.
CHANG J Q, HAO X P, LV B, et al. Development of Self-calibrated Infrared Radiation Thermometer for Surface of Ground or Water［J］. Acta Metrologica Sinica, 2019, 40(2): 240-245.
SONG X Y, DONG W, PAN Y J, et al. Measurement of high-temperature infrared spectral emissivity of graphite materials from 1000 to 1500℃ based on integrated blackbody method［J］. Journal of Infrared and Millimeter Waves, 2021, 40(2): 204-213.
［12］
SUN L G, SONG X Y, AN B L, et al. Research of temperature distribution and radiation characteristics of integrated blackbody on high-temperature ［C］// AOPC 2022: Infrared Devices and Infrared Technology,and Terahertz Technology and Applications. Beijing, 2022.
LIU B, ZHENG W, LI H Y, et al. Study on Integrated Emissivity of an Isothermal Blackbody Cavity with Response Surface Methodology［J］. Acta Metrologica Sinica, 2019, 40(4): 625-630.
SHEN J L, XING T T, WU F. Research on the Effective Emissivity of Conical Blackbody Cavity Based on Monte-Carlo Method［J］. Acta Metrologica Sinica, 2018, 39(3): 359-362.
2024, Vol. 45 
