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Development of High-Speed Spectroscopy for Measurement of Thermal Radiation Phenomena of Surfaces

表面热辐射现象测量高速光谱学的发展

基本信息

批准号：
10555068
负责人：
MAKINO Toshiro
金额：
$ 8.26万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555068/
关键词：
Thermal Radiation Property Radiative Heat Transfer Radiation Pyrometry In-process Measurement Spectroscopic Measurement Surface Diagnosis Surface Roughness Surface Film

项目摘要

Real surfaces in actual natural/industrial environments are far different from clean optically smooth surfaces in laboratories. The surfaces have microscopic roughness and they are covered by any surface films in most cases. Furthermore, microstructure of the real surface changes from time to time in the crude environments. Recently, physical/chem-cal processes, in which surface state is positively changed, has been put into practical use. We should make a spectroscopy research in order to clarify thermal radiation charac-teristics of such a real surface for heat transfer evaluation or in order to establish a new surface diagnosis technique using radiation.First, we improved our high-speed spectrophotometer system which measures reflection and emission spectra over a wide spectral reagion from near-ultraviolet to infrared (0.32〜14 μm) in one system simultaneously and repeatedly with a cycle time of 1 s. Second, we used this experimental system in a wavelength region of λ=0.32〜11 μm to measure the transition of reflection and emission spectra of metal surfaces in an air-oxidation process at high temperatures. Measured phenomena of radiation interference and diffraction suggested the mechanism of oxide film growth and roughness creation on the film surface. Third, taking note of this phenomena, we presented/improved an algorithm of an in-process surface diagnosis technique for diagnosing the surface temperature and surface micro-structure of real metal surfaces based on a high-speed spectrum measurement. An experimental examination of the surface diagnosis is made on a metal surface in an air-oxidation process at high temperature, and the ability of the presented technique is demonstrated.

实际自然/工业环境中的真实表面与实验室中清洁的光学光滑表面有很大的不同。表面具有微观粗糙度，在大多数情况下，它们被任何表面膜覆盖。此外，在恶劣的环境中，真实表面的微观结构也会发生变化。近年来，表面态发生正向变化的物理/化学过程已投入实际应用。首先，我们改进了我们的高速光谱仪系统，在一个系统中同时、重复地测量了从近紫外到红外(0.32~14μm)的宽光谱范围内的反射光谱和发射光谱，周期为1 S。其次，我们利用这个实验系统在λ=0.32~11μm的波长范围内测量了高温空气氧化过程中金属表面的反射光谱和发射光谱的跃迁。测量的辐射干涉和衍射现象表明，氧化膜的生长和表面粗糙度的产生是可能的。第三，针对这一现象，我们提出了一种基于高速光谱测量的在线表面诊断技术，用于诊断真实金属表面的表面温度和表面微结构。对金属表面高温空气氧化过程中的表面诊断进行了实验检验，验证了该方法的有效性。