基于透射法的半透明介质辐射特性测量研究
发布时间：2019-05-12 08:31
【摘要】：随着半透明介质在航空航天、能源动力、化工材料等领域的应用越来越广泛,其辐射特性参数的研究备受关注。虽然国外针对该领域开展了较多研究,但由于不同形成方式、不同产地的半透明介质辐射物性存在差异,且不同应用背景下的介质辐射物性也存在一定差别,尤其是随着高温条件下的应用越来越多,故获取国产半透明介质材料的辐射特性参数已成为热门研究方向之一。本文以半透明介质为研究对象,说明了基于K-K关系式的透射法和双厚度透射法两类方法的局限性,并分别与吸收性固体介质、液体介质和吸收散射性固体介质等测量对象相结合,获得了一些典型半透明材料在不同温度下的辐射特性参数。论文主要包括以下三方面内容:(1)基于透射法测量半透明介质的系统光路分析。建立了包括离轴抛物面镜、椭球面镜等二次反射面与半透明介质组合系统的光路分析模型,采用蒙特卡洛法对系统进行分析。以Bruker光谱仪为研究对象,分别从光路因素和介质辐射特性因素两方面对透射法测量光路系统的影响进行了具体分析,为后续研究提供理论依据。(2)针对块状固体(单层结构)、液体及高温固体(多层结构),分别建立了基于K-K关系式的透射法和双厚度透射法的辐射特性求解模型。对于与K-K关系式相结合的透射法,考虑了入射角度、窗片等因素的影响;对于双厚度法,考虑了液体工质的多层封装特性,分析了测量误差对反演结果的影响。(3)开展了实验台设计、搭建及典型半透明材料不同温度下的辐射特性测量研究。通过对光谱仪和不同样品加热腔的组合,基于透射法基本原理,建立了相应的半透明介质辐射特性测量系统。通过蒸馏水辐射物性的测量反演验证方法可靠性的基础上,分别针对石英、液态碳氢燃料、气凝胶等典型半透明介质开展不同温度下的实验测量和辐射特性参数反演。本文的研究主要为半透明介质的辐射特性参数反演提供参考方法,并基于该方法给出部分典型半透明介质的辐射特性,以供相关研究者选用。
[Abstract]:With the wide application of translucent media in aerospace, energy power, chemical materials and other fields, the study of radiation characteristic parameters has attracted much attention. Although more research has been carried out in this field abroad, due to different formation modes, the radiation properties of translucent media from different producing areas are different, and there are also some differences in the radiation properties of media under different application backgrounds. Especially with more and more applications at high temperature, it has become one of the hot research directions to obtain the radiation characteristic parameters of domestic translucent dielectric materials. In this paper, taking translucent medium as the research object, the limitations of transmission method and double thickness transmission method based on K 鈮，
本文编号：2475250
[Abstract]:With the wide application of translucent media in aerospace, energy power, chemical materials and other fields, the study of radiation characteristic parameters has attracted much attention. Although more research has been carried out in this field abroad, due to different formation modes, the radiation properties of translucent media from different producing areas are different, and there are also some differences in the radiation properties of media under different application backgrounds. Especially with more and more applications at high temperature, it has become one of the hot research directions to obtain the radiation characteristic parameters of domestic translucent dielectric materials. In this paper, taking translucent medium as the research object, the limitations of transmission method and double thickness transmission method based on K 鈮，
本文编号：2475250
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