【摘要】：隨著半透明介質(zhì)在航空航天、能源動(dòng)力、化工材料等領(lǐng)域的應(yīng)用越來越廣泛,其輻射特性參數(shù)的研究備受關(guān)注。雖然國外針對(duì)該領(lǐng)域開展了較多研究,但由于不同形成方式、不同產(chǎn)地的半透明介質(zhì)輻射物性存在差異,且不同應(yīng)用背景下的介質(zhì)輻射物性也存在一定差別,尤其是隨著高溫條件下的應(yīng)用越來越多,故獲取國產(chǎn)半透明介質(zhì)材料的輻射特性參數(shù)已成為熱門研究方向之一。本文以半透明介質(zhì)為研究對(duì)象,說明了基于K-K關(guān)系式的透射法和雙厚度透射法兩類方法的局限性,并分別與吸收性固體介質(zhì)、液體介質(zhì)和吸收散射性固體介質(zhì)等測(cè)量對(duì)象相結(jié)合,獲得了一些典型半透明材料在不同溫度下的輻射特性參數(shù)。論文主要包括以下三方面內(nèi)容:(1)基于透射法測(cè)量半透明介質(zhì)的系統(tǒng)光路分析。建立了包括離軸拋物面鏡、橢球面鏡等二次反射面與半透明介質(zhì)組合系統(tǒng)的光路分析模型,采用蒙特卡洛法對(duì)系統(tǒng)進(jìn)行分析。以Bruker光譜儀為研究對(duì)象,分別從光路因素和介質(zhì)輻射特性因素兩方面對(duì)透射法測(cè)量光路系統(tǒng)的影響進(jìn)行了具體分析,為后續(xù)研究提供理論依據(jù)。(2)針對(duì)塊狀固體(單層結(jié)構(gòu))、液體及高溫固體(多層結(jié)構(gòu)),分別建立了基于K-K關(guān)系式的透射法和雙厚度透射法的輻射特性求解模型。對(duì)于與K-K關(guān)系式相結(jié)合的透射法,考慮了入射角度、窗片等因素的影響;對(duì)于雙厚度法,考慮了液體工質(zhì)的多層封裝特性,分析了測(cè)量誤差對(duì)反演結(jié)果的影響。(3)開展了實(shí)驗(yàn)臺(tái)設(shè)計(jì)、搭建及典型半透明材料不同溫度下的輻射特性測(cè)量研究。通過對(duì)光譜儀和不同樣品加熱腔的組合,基于透射法基本原理,建立了相應(yīng)的半透明介質(zhì)輻射特性測(cè)量系統(tǒng)。通過蒸餾水輻射物性的測(cè)量反演驗(yàn)證方法可靠性的基礎(chǔ)上,分別針對(duì)石英、液態(tài)碳?xì)淙剂�、氣凝膠等典型半透明介質(zhì)開展不同溫度下的實(shí)驗(yàn)測(cè)量和輻射特性參數(shù)反演。本文的研究主要為半透明介質(zhì)的輻射特性參數(shù)反演提供參考方法,并基于該方法給出部分典型半透明介質(zhì)的輻射特性,以供相關(guān)研究者選用。
[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，

本文編號(hào)：2475250