Micro- and Micro-scopic Approach to Transport Phenomena of Heat and Radiation among Real Surfaces

真实表面间热和辐射传输现象的微观和微观方法

基本信息

批准号：
09450091
负责人：
MAKINO Toshiro
金额：
$ 8.45万
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：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450091/
关键词：
Conductive Heat Transfer Thermal Contact Resistance Ultrasonic Wave Measurement Radiative Heat Transfer Thermal Radiation Property Optical Measurement Technique Real Surface Surface Diagnosis ふく射物性熱伝導超音波診断分子動力学塑性変形

项目摘要

Real surfaces in thermal engineering systems 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. Phenomena on such surfaces are important in two engineering science problems : first, thermal contact resistance on solid-solid interface, and second, thermal radiation characteristics and optical surface diagnosis. On the above aspect, we dealt with the following four subjects.First, we pursue an in-situ technique for diagnosing the thermal contact resistance on a solid-solid interface from outside, since microstructure of the contact interface changes with time depending on applied pressure and deformation in crystal structure. We applied a ultrasonic wave technique for crack-search to our contact resistance problemWe conducted macroscopic experiments on ultrasonic wave reflection on a metal-metal contact interface and heat transmission through the interface.Second, we made … More a microscopic study of molecular dynamics on inhomogeneous thermal energy flow through a finite-size atom column, which simulates a solid-solid contact point. Such a study must be an elementary unit of a study on micromechanism of thermal contact resistance. It was demonstrated that in a micro-channel of atoms of a finite size, where influence of the surface of the channel is effective, thermal energy does not flow homogeneously but flows more in the central part of the channel.Third, we extended our high-speed spectroscopy for investigating thermal radiation characteristics of real surfaces in industrial environments. We improved our spectrophotometer system which measures reflection and emission spectra simultaneously and repeatedly over a wide spectral region from visible to infrared in one system. We applied the experimental system to the investigation of radiation characteristics of metal surfaces in an oxidation process. And, we proposed an algorithm for diagnosing the surface temperature and surface microstructure of a metal.Fourth, we investigated experimentally on directional characteristics of radiation reflection on rough metal surfaces with evaluation of radiation heat transfer parameters which contributes the study for the radiative transfer evaluation and that for the development in an optical surface diagnosis technique. Less

热工程系统中的真实表面是实验室中的光滑光滑表面。首先，我们采用一种原位技术来诊断外部固体界面上的热接触电阻，因为什一堂的微观结构是什一堂什一堂什一堂的微观结构，我们应用了一种超声波技术来进行裂纹搜索触点抗性问题，我们进行了巨大的oltrasostents Oltrasont Oltrasont oltrasont oltrasont oltrasont oltrasont oltrasont oltrasont oltrasont oltrasont oltrasont oltrasont oltrasontsont IC在金属组合体和热槽上的波浪反射。第二次Ermal能量通过有限的大小原子柱，该原子柱模拟了固体固体接触点。在有限尺寸的原子的微通道中用于研究NDSUCTRIAL环境中真实表面的热辐射特征的光谱。金属表面的辐射特性。诱发了一种用于诊断金属表面温度微观结构的算法。具有辐射热传递参数在粗糙金属表面上辐射反射的四个特征开放的光学表面诊断技术