Author:
Liu Bo,Wang Chong-yuan,Xu Jun-long,Wang Zhi-yuan,Zhu Peng-fei
Abstract
Abstract
Temperature is a critical parameter for energy efficiency measurement evaluation. High-performance blackbody radiation source is the key equipment for highly precision reproduction of radiation temperature. The effects of blackbody geometric parameters, cavity material emissivity, and temperature distribution on integrated effective emissivity e and normalized spatial integrated effective emissivity variation were studied by finite volume method. The numerical simulation has a good agreement with the result computed by Monte-Carlo method. The results show that the isothermal cavity has a higher e and a smaller than the non-isothermal. A smaller aperture diameter Da
and a higher material emissivity are benefit for a higher e and a more uniform distribution on detector of e. The results provide references for the design and study on high-performance blackbody radiation source.